/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:46:33,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:46:33,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:46:33,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:46:33,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:46:33,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:46:33,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:46:33,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:46:33,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:46:33,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:46:33,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:46:33,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:46:33,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:46:33,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:46:33,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:46:33,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:46:33,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:46:33,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:46:33,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:46:33,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:46:33,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:46:33,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:46:33,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:46:33,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:46:33,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:46:33,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:46:33,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:46:33,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:46:33,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:46:33,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:46:33,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:46:33,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:46:33,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:46:33,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:46:33,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:46:33,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:46:33,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:46:33,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:46:33,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:46:33,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:46:33,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:46:33,608 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 23:46:33,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:46:33,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:46:33,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:46:33,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:46:33,648 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:46:33,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:46:33,649 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:46:33,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:46:33,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:46:33,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:46:33,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:46:33,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:46:33,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:46:33,651 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:46:33,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:46:33,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:46:33,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:46:33,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:46:33,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:46:33,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:46:33,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:46:33,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:46:33,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:46:33,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:46:33,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:46:33,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:46:33,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:46:33,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:46:33,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:46:33,654 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 23:46:33,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:46:33,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:46:33,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:46:33,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:46:33,971 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:46:33,972 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2020-10-13 23:46:34,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/021ab502d/29621b7fd52d4ad793c49b5a9357358b/FLAG2fbc80ada [2020-10-13 23:46:34,492 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:46:34,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2020-10-13 23:46:34,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/021ab502d/29621b7fd52d4ad793c49b5a9357358b/FLAG2fbc80ada [2020-10-13 23:46:34,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/021ab502d/29621b7fd52d4ad793c49b5a9357358b [2020-10-13 23:46:34,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:46:34,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:46:34,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:46:34,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:46:34,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:46:34,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:46:34" (1/1) ... [2020-10-13 23:46:34,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b599924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:34, skipping insertion in model container [2020-10-13 23:46:34,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:46:34" (1/1) ... [2020-10-13 23:46:34,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:46:34,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:46:35,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:46:35,107 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:46:35,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:46:35,146 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:46:35,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35 WrapperNode [2020-10-13 23:46:35,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:46:35,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:46:35,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:46:35,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:46:35,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (1/1) ... [2020-10-13 23:46:35,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:46:35,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:46:35,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:46:35,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:46:35,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (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 23:46:35,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:46:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:46:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:46:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:46:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:46:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:46:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:46:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:46:35,578 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:46:35,579 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:46:35,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:46:35 BoogieIcfgContainer [2020-10-13 23:46:35,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:46:35,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:46:35,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:46:35,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:46:35,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:46:34" (1/3) ... [2020-10-13 23:46:35,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8118906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:46:35, skipping insertion in model container [2020-10-13 23:46:35,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:46:35" (2/3) ... [2020-10-13 23:46:35,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8118906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:46:35, skipping insertion in model container [2020-10-13 23:46:35,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:46:35" (3/3) ... [2020-10-13 23:46:35,593 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2020-10-13 23:46:35,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:46:35,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:46:35,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:46:35,679 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:46:35,679 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:46:35,679 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:46:35,679 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:46:35,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:46:35,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:46:35,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:46:35,680 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:46:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 23:46:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:46:35,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:35,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:35,711 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-13 23:46:35,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:35,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885444873] [2020-10-13 23:46:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:46:36,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-13 23:46:36,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:36,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:46:36,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:36,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:46:36,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:36,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:36,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:46:36,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:36,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:36,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:36,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:36,180 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 23:46:36,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885444873] [2020-10-13 23:46:36,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:46:36,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:46:36,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201929636] [2020-10-13 23:46:36,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:46:36,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:46:36,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:46:36,208 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 23:46:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:36,293 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 23:46:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:46:36,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:46:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:36,304 INFO L225 Difference]: With dead ends: 41 [2020-10-13 23:46:36,305 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 23:46:36,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:46:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 23:46:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 23:46:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 23:46:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 23:46:36,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 23:46:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:36,353 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 23:46:36,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:46:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 23:46:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:46:36,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:36,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:36,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:46:36,355 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2020-10-13 23:46:36,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:36,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037992655] [2020-10-13 23:46:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:46:36,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:36,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-13 23:46:36,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:46:36,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:36,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:46:36,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:36,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:36,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:36,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:46:36,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:36,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:36,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:36,531 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 23:46:36,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037992655] [2020-10-13 23:46:36,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:46:36,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:46:36,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430894463] [2020-10-13 23:46:36,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:46:36,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:46:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:46:36,539 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 23:46:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:36,600 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 23:46:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:46:36,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:46:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:36,602 INFO L225 Difference]: With dead ends: 32 [2020-10-13 23:46:36,602 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 23:46:36,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:46:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 23:46:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 23:46:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 23:46:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 23:46:36,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-13 23:46:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:36,611 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 23:46:36,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:46:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 23:46:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:46:36,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:36,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:36,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:46:36,613 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:36,613 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2020-10-13 23:46:36,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:36,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486449888] [2020-10-13 23:46:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:46:36,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:36,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-13 23:46:36,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:46:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:46:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:46:36,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:36,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:36,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:36,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:36,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:46:36,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:36,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:36,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:46:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:46:36,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486449888] [2020-10-13 23:46:36,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:46:36,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:46:36,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928234856] [2020-10-13 23:46:36,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:46:36,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:46:36,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:46:36,845 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 23:46:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:36,926 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 23:46:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:46:36,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:46:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:36,931 INFO L225 Difference]: With dead ends: 34 [2020-10-13 23:46:36,931 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:46:36,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:46:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:46:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 23:46:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:46:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:46:36,956 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-13 23:46:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:36,956 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:46:36,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:46:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:46:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:46:36,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:36,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:36,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:46:36,959 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-13 23:46:36,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:36,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537199873] [2020-10-13 23:46:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:37,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:46:37,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:37,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-13 23:46:37,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:37,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:46:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:46:37,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:46:37,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:37,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:37,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:37,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:37,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:37,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:37,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:46:37,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537199873] [2020-10-13 23:46:37,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:37,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:46:37,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162835896] [2020-10-13 23:46:37,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:46:37,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:37,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:46:37,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:46:37,507 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 23:46:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:37,580 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-13 23:46:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:46:37,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 23:46:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:37,582 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:46:37,582 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:46:37,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:46:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:46:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 23:46:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:46:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 23:46:37,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-13 23:46:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:37,589 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 23:46:37,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:46:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 23:46:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:46:37,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:37,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:37,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:46:37,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash -406079354, now seen corresponding path program 2 times [2020-10-13 23:46:37,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:37,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199679851] [2020-10-13 23:46:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:37,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:46:37,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:37,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-13 23:46:37,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:37,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:46:37,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:46:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:46:37,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:37,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:37,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:37,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:37,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:37,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:37,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:37,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:37,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:37,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:37,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:37,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 23:46:37,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199679851] [2020-10-13 23:46:37,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:37,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:46:37,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428614587] [2020-10-13 23:46:37,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:46:37,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:37,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:46:37,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:46:37,975 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 23:46:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:38,068 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 23:46:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:46:38,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 23:46:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:38,070 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:46:38,070 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:46:38,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:46:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:46:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 23:46:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:46:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 23:46:38,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-13 23:46:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:38,077 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 23:46:38,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:46:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 23:46:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:46:38,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:38,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:38,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:46:38,079 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -820912923, now seen corresponding path program 3 times [2020-10-13 23:46:38,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:38,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370565309] [2020-10-13 23:46:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:38,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:38,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:46:38,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:38,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-13 23:46:38,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:38,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:46:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:46:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:46:38,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:38,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:38,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:38,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:38,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:38,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:38,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:38,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:38,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:38,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:38,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:46:38,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370565309] [2020-10-13 23:46:38,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:38,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:46:38,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907769789] [2020-10-13 23:46:38,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:46:38,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:46:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:46:38,706 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 23:46:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:38,815 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 23:46:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:46:38,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 23:46:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:38,817 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:46:38,817 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:46:38,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:46:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:46:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-13 23:46:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:46:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 23:46:38,824 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-13 23:46:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:38,825 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 23:46:38,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:46:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 23:46:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:46:38,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:38,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:38,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:46:38,826 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1912151398, now seen corresponding path program 4 times [2020-10-13 23:46:38,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:38,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946290308] [2020-10-13 23:46:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:38,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:38,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:39,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:39,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:39,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:46:39,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:39,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-13 23:46:39,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:39,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:39,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:46:39,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:46:39,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:46:39,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:40,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:40,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:40,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:40,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:40,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:40,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:40,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:40,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:40,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:40,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:40,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:46:40,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946290308] [2020-10-13 23:46:40,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:40,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:46:40,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116054996] [2020-10-13 23:46:40,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:46:40,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:46:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:46:40,055 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 23:46:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:40,190 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-13 23:46:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:46:40,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 23:46:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:40,192 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:46:40,192 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:46:40,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:46:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:46:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-13 23:46:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:46:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 23:46:40,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-13 23:46:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:40,199 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 23:46:40,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:46:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 23:46:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:46:40,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:40,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:40,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:46:40,201 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 378570245, now seen corresponding path program 5 times [2020-10-13 23:46:40,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:40,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914399762] [2020-10-13 23:46:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:40,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:40,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:41,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:41,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:46:41,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-13 23:46:41,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:41,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:46:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:41,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:46:41,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:41,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:41,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:41,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:41,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:41,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:41,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:41,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:41,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:41,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:41,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:46:41,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914399762] [2020-10-13 23:46:41,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:41,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:46:41,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004941614] [2020-10-13 23:46:41,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:46:41,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:46:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:46:41,625 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-13 23:46:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:41,757 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-13 23:46:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:46:41,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 23:46:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:41,759 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:46:41,760 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 23:46:41,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:46:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 23:46:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-13 23:46:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:46:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 23:46:41,766 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-13 23:46:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 23:46:41,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:46:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 23:46:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:46:41,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:41,768 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:41,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:46:41,769 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1127030057, now seen corresponding path program 6 times [2020-10-13 23:46:41,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:41,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226947340] [2020-10-13 23:46:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:41,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:41,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:43,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:43,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:46:43,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:43,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2044 [2020-10-13 23:46:43,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:43,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:43,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:46:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:43,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:46:43,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:43,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:43,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:43,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:43,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:43,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:43,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:43,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:43,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:43,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:43,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:43,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:46:43,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226947340] [2020-10-13 23:46:43,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:43,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:46:43,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728410682] [2020-10-13 23:46:43,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:46:43,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:46:43,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:46:43,935 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-13 23:46:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:44,081 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 23:46:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:46:44,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 23:46:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:44,085 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:46:44,085 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:46:44,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:46:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:46:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-13 23:46:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:46:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 23:46:44,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-13 23:46:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:44,097 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 23:46:44,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:46:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 23:46:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:46:44,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:44,098 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:44,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:46:44,099 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1440519547, now seen corresponding path program 7 times [2020-10-13 23:46:44,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:44,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891870500] [2020-10-13 23:46:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:44,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:44,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:46,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:46:46,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:46,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2123 [2020-10-13 23:46:46,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:46,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:46:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:46:46,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:46:46,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:46,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:46,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:46,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:46,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:46,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:46,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:46:46,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891870500] [2020-10-13 23:46:46,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:46,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:46:46,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075148953] [2020-10-13 23:46:46,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:46:46,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:46,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:46:46,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:46:46,353 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-13 23:46:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:46,462 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-13 23:46:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:46:46,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 23:46:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:46,463 INFO L225 Difference]: With dead ends: 52 [2020-10-13 23:46:46,463 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:46:46,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:46:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:46:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 23:46:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:46:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 23:46:46,472 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-13 23:46:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:46,473 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 23:46:46,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:46:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 23:46:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:46:46,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:46,475 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:46,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:46:46,475 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 569821353, now seen corresponding path program 8 times [2020-10-13 23:46:46,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:46,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308934582] [2020-10-13 23:46:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:46,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:47,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:48,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:46:48,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2504 [2020-10-13 23:46:48,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:48,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:46:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:46:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:46:48,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:49,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:49,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:49,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:49,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:49,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:49,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:46:49,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308934582] [2020-10-13 23:46:49,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:49,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:46:49,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544144356] [2020-10-13 23:46:49,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:46:49,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:46:49,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:46:49,084 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-13 23:46:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:49,253 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-13 23:46:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:46:49,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-13 23:46:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:49,255 INFO L225 Difference]: With dead ends: 61 [2020-10-13 23:46:49,255 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:46:49,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:46:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:46:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-10-13 23:46:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:46:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 23:46:49,264 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-13 23:46:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:49,265 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 23:46:49,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:46:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 23:46:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:46:49,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:49,271 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:49,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:46:49,271 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1633268026, now seen corresponding path program 9 times [2020-10-13 23:46:49,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:49,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153769177] [2020-10-13 23:46:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:51,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:51,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:46:51,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:51,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2435 [2020-10-13 23:46:51,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:51,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:46:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:46:51,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:51,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:51,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:51,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:51,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:46:51,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:51,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:46:51,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153769177] [2020-10-13 23:46:51,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:51,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:46:51,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60097197] [2020-10-13 23:46:51,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:46:51,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:46:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:46:51,843 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-13 23:46:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:51,970 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 23:46:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:46:51,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 23:46:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:51,971 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:46:51,972 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:46:51,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:46:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:46:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-13 23:46:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:46:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 23:46:51,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-13 23:46:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:51,982 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 23:46:51,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:46:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 23:46:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:46:51,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:51,985 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:51,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:46:51,986 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1864020970, now seen corresponding path program 10 times [2020-10-13 23:46:51,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:51,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824884491] [2020-10-13 23:46:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:52,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:54,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:54,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:46:54,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2230 [2020-10-13 23:46:54,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:54,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:46:54,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:54,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:46:54,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:54,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:54,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:54,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:54,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:54,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:54,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:54,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:54,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:54,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:46:54,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824884491] [2020-10-13 23:46:54,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:54,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:46:54,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056404944] [2020-10-13 23:46:54,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:46:54,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:46:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:46:54,374 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-13 23:46:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:54,506 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-13 23:46:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:46:54,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-13 23:46:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:54,508 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:46:54,508 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:46:54,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:46:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:46:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-13 23:46:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:46:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 23:46:54,518 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-13 23:46:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:54,520 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 23:46:54,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:46:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 23:46:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:46:54,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:54,521 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:54,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:46:54,522 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 11 times [2020-10-13 23:46:54,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:54,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87425802] [2020-10-13 23:46:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:54,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:55,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:56,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:56,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:46:56,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2305 [2020-10-13 23:46:56,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:56,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:56,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:46:56,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:46:56,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:46:56,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:56,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:56,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:56,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:56,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:56,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:56,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:56,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:56,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:56,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:56,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:56,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 23:46:56,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87425802] [2020-10-13 23:46:56,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:56,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:46:56,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569169744] [2020-10-13 23:46:56,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:46:56,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:46:56,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:46:56,933 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-13 23:46:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:57,099 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-13 23:46:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:46:57,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-13 23:46:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:57,101 INFO L225 Difference]: With dead ends: 67 [2020-10-13 23:46:57,101 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:46:57,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:46:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:46:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2020-10-13 23:46:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:46:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 23:46:57,114 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-13 23:46:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:57,114 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 23:46:57,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:46:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 23:46:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:46:57,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:57,117 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:57,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:46:57,117 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:57,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 12 times [2020-10-13 23:46:57,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:57,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791925437] [2020-10-13 23:46:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:57,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:57,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:00,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:47:00,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2972 [2020-10-13 23:47:00,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:00,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:47:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:47:00,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:00,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:00,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:00,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:00,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:00,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:00,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:00,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:00,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:00,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:00,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:00,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:00,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:47:00,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791925437] [2020-10-13 23:47:00,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:00,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:47:00,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198515892] [2020-10-13 23:47:00,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:47:00,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:47:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:47:00,250 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-10-13 23:47:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:00,350 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-13 23:47:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:47:00,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-13 23:47:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:00,352 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:47:00,352 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:47:00,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:47:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:47:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-13 23:47:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:47:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 23:47:00,359 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-13 23:47:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:00,360 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 23:47:00,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:47:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 23:47:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:47:00,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:00,362 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:00,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:47:00,363 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1812639707, now seen corresponding path program 13 times [2020-10-13 23:47:00,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:00,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476512084] [2020-10-13 23:47:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:00,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:00,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:01,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:03,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:03,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:47:03,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2803 [2020-10-13 23:47:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:03,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:47:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:47:03,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:47:03,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:03,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:03,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:03,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:03,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:03,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:47:03,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:03,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:03,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:03,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 23:47:03,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476512084] [2020-10-13 23:47:03,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:03,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:47:03,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833141941] [2020-10-13 23:47:03,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:47:03,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:47:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:47:03,269 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-10-13 23:47:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:03,448 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-13 23:47:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:47:03,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-13 23:47:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:03,450 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:47:03,450 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:47:03,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:47:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:47:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2020-10-13 23:47:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:47:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 23:47:03,459 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-10-13 23:47:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:03,459 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 23:47:03,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:47:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 23:47:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:47:03,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:03,462 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:03,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:47:03,462 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:03,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1819850442, now seen corresponding path program 14 times [2020-10-13 23:47:03,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:03,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120215114] [2020-10-13 23:47:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:03,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:04,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:05,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:05,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:47:05,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:05,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2223 [2020-10-13 23:47:05,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:05,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:47:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:47:05,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:05,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:05,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:05,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:05,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:05,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:05,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:05,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:47:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120215114] [2020-10-13 23:47:05,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:05,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:47:05,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995570263] [2020-10-13 23:47:05,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:47:05,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:47:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:47:05,849 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-13 23:47:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:05,987 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-13 23:47:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:47:05,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-13 23:47:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:05,988 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:47:05,988 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:47:05,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:47:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:47:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-13 23:47:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:47:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 23:47:05,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-13 23:47:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:05,995 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 23:47:05,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:47:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 23:47:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:47:05,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:05,999 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:05,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:47:05,999 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:06,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1533667366, now seen corresponding path program 15 times [2020-10-13 23:47:06,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:06,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11900419] [2020-10-13 23:47:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:06,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:08,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:08,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:47:08,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2618 [2020-10-13 23:47:08,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:08,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:47:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:08,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:47:08,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:08,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:08,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:08,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:08,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:08,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:08,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:08,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:08,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:08,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:08,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:47:08,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11900419] [2020-10-13 23:47:08,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:08,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:47:08,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634342424] [2020-10-13 23:47:08,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:47:08,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:08,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:47:08,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:47:08,814 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 16 states. [2020-10-13 23:47:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:08,970 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-13 23:47:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:47:08,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-13 23:47:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:08,972 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:47:08,973 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:47:08,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:47:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:47:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-13 23:47:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:47:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 23:47:08,978 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2020-10-13 23:47:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:08,978 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 23:47:08,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:47:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 23:47:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:47:08,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:08,979 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:08,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:47:08,979 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1251926602, now seen corresponding path program 16 times [2020-10-13 23:47:08,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:08,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101643282] [2020-10-13 23:47:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:10,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:12,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:12,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:47:12,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:12,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3047 [2020-10-13 23:47:12,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:12,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:47:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:47:12,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:47:12,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:12,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:12,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:12,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:12,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:12,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:12,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:12,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:12,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:12,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:12,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:12,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 23:47:12,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101643282] [2020-10-13 23:47:12,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:12,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:47:12,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741087757] [2020-10-13 23:47:12,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:47:12,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:47:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:47:12,148 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2020-10-13 23:47:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:12,374 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-13 23:47:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:47:12,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 23:47:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:12,376 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:47:12,376 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:47:12,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:47:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:47:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2020-10-13 23:47:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:47:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 23:47:12,382 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-13 23:47:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:12,382 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 23:47:12,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:47:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 23:47:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:47:12,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:12,383 INFO L422 BasicCegarLoop]: trace histogram [13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:12,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:47:12,384 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1962841787, now seen corresponding path program 17 times [2020-10-13 23:47:12,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:12,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782944853] [2020-10-13 23:47:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:12,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:15,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:15,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:47:15,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:15,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3336 [2020-10-13 23:47:15,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:15,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:15,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:47:15,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:15,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:47:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:15,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:15,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:15,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:15,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:15,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:15,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:15,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:15,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:47:15,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782944853] [2020-10-13 23:47:15,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:15,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:47:15,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438072766] [2020-10-13 23:47:15,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:47:15,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:47:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:47:15,903 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 17 states. [2020-10-13 23:47:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:16,093 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-10-13 23:47:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:47:16,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-13 23:47:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:16,094 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:47:16,094 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 23:47:16,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:47:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 23:47:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-13 23:47:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:47:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-13 23:47:16,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-10-13 23:47:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:16,099 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-13 23:47:16,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:47:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-13 23:47:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:47:16,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:16,100 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:16,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:47:16,100 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2132776343, now seen corresponding path program 18 times [2020-10-13 23:47:16,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:16,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592162437] [2020-10-13 23:47:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:16,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:18,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:20,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:20,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:47:20,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:20,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4209 [2020-10-13 23:47:20,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:20,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:47:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:47:20,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:47:20,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:20,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:20,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:20,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:20,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:20,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 23:47:20,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592162437] [2020-10-13 23:47:20,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:20,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:47:20,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334008135] [2020-10-13 23:47:20,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:47:20,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:20,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:47:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:47:20,442 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-10-13 23:47:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:20,685 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-13 23:47:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:47:20,686 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-13 23:47:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:20,687 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:47:20,687 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:47:20,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:47:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:47:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-10-13 23:47:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:47:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-13 23:47:20,694 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2020-10-13 23:47:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:20,694 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-13 23:47:20,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:47:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-13 23:47:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:47:20,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:20,695 INFO L422 BasicCegarLoop]: trace histogram [14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:20,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:47:20,696 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash 485549318, now seen corresponding path program 19 times [2020-10-13 23:47:20,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:20,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911397615] [2020-10-13 23:47:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4062 [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:24,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:47:24,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:24,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:47:24,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:24,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:24,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:24,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:24,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:24,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:24,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:24,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:24,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 23:47:24,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911397615] [2020-10-13 23:47:24,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:24,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:47:24,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185647875] [2020-10-13 23:47:24,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:47:24,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:47:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:47:24,967 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2020-10-13 23:47:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:25,107 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-13 23:47:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:47:25,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-13 23:47:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:25,110 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:47:25,110 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:47:25,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:47:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:47:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-13 23:47:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:47:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 23:47:25,116 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2020-10-13 23:47:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:25,118 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 23:47:25,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:47:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 23:47:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:47:25,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:25,119 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:25,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:47:25,119 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:25,120 INFO L82 PathProgramCache]: Analyzing trace with hash 387198250, now seen corresponding path program 20 times [2020-10-13 23:47:25,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:25,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403872333] [2020-10-13 23:47:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:25,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:26,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:29,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:29,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:47:29,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:29,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4250 [2020-10-13 23:47:29,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:29,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:29,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:47:29,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:47:29,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:47:29,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:29,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:29,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:29,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:29,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:29,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:29,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:47:29,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403872333] [2020-10-13 23:47:29,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:29,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:47:29,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898015525] [2020-10-13 23:47:29,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:47:29,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:47:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:47:29,521 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2020-10-13 23:47:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:29,740 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-13 23:47:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:47:29,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-13 23:47:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:29,741 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:47:29,741 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:47:29,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:47:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:47:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-10-13 23:47:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:47:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 23:47:29,747 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-10-13 23:47:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:29,747 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 23:47:29,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:47:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 23:47:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:47:29,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:29,748 INFO L422 BasicCegarLoop]: trace histogram [15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:29,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:47:29,748 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1295350373, now seen corresponding path program 21 times [2020-10-13 23:47:29,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:29,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19835618] [2020-10-13 23:47:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:29,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:34,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4578 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:47:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:35,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:35,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:35,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:35,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:47:35,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:35,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:35,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:35,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:35,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:47:35,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19835618] [2020-10-13 23:47:35,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:35,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:47:35,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755632608] [2020-10-13 23:47:35,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:47:35,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:47:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:47:35,163 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 20 states. [2020-10-13 23:47:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:35,514 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-13 23:47:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:47:35,515 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-13 23:47:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:35,516 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:47:35,516 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:47:35,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:47:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:47:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-13 23:47:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:47:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 23:47:35,525 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-10-13 23:47:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:35,525 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 23:47:35,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:47:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 23:47:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:47:35,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:35,526 INFO L422 BasicCegarLoop]: trace histogram [15, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:35,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:47:35,526 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 413886924, now seen corresponding path program 1 times [2020-10-13 23:47:35,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:35,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521499998] [2020-10-13 23:47:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:35,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:35,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:40,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:40,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:47:40,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:40,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:47:40,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:40,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:40,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:47:40,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:40,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:47:40,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:40,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:40,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:40,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:40,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:47:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:40,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:40,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:40,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:40,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:40,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:47:40,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:40,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:40,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:40,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 23:47:40,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521499998] [2020-10-13 23:47:40,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:40,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:47:40,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27902473] [2020-10-13 23:47:40,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:47:40,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:47:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:47:40,762 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-13 23:47:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:40,911 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-13 23:47:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:47:40,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-13 23:47:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:40,913 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:47:40,913 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:47:40,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:47:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:47:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-10-13 23:47:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:47:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 23:47:40,920 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-13 23:47:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:40,921 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 23:47:40,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:47:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 23:47:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:47:40,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:40,921 INFO L422 BasicCegarLoop]: trace histogram [16, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:40,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:47:40,922 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash -670234072, now seen corresponding path program 2 times [2020-10-13 23:47:40,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:40,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881375163] [2020-10-13 23:47:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:40,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:40,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:45,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:47:45,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:46,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:46,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:46,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:46,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:47:46,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:46,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:46,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:46,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:46,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:47:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:46,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:46,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:46,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:46,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:46,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:46,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:46,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:46,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:46,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 23:47:46,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881375163] [2020-10-13 23:47:46,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:46,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:47:46,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932396587] [2020-10-13 23:47:46,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:47:46,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:47:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:47:46,255 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 20 states. [2020-10-13 23:47:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:46,537 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-13 23:47:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:47:46,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-13 23:47:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:46,539 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:47:46,540 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:47:46,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:47:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:47:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-10-13 23:47:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:47:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 23:47:46,560 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-13 23:47:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:46,561 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 23:47:46,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:47:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 23:47:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:47:46,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:46,562 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:46,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:47:46,563 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 81753420, now seen corresponding path program 3 times [2020-10-13 23:47:46,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:46,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484906832] [2020-10-13 23:47:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:46,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:51,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:51,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:47:51,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:51,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:47:51,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:51,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:47:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:47:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:47:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:51,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:51,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:51,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:51,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:51,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:51,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:51,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:51,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:51,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:47:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:51,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:51,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:51,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:51,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:51,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:51,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:51,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:51,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-13 23:47:51,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484906832] [2020-10-13 23:47:51,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:51,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:47:51,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673906171] [2020-10-13 23:47:51,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:47:51,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:47:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:47:51,769 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 15 states. [2020-10-13 23:47:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:52,157 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-13 23:47:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:47:52,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 23:47:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:52,159 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:47:52,159 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:47:52,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:47:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:47:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2020-10-13 23:47:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:47:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-13 23:47:52,178 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2020-10-13 23:47:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:52,178 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-13 23:47:52,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:47:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-13 23:47:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:47:52,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:52,179 INFO L422 BasicCegarLoop]: trace histogram [17, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:52,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:47:52,180 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -113069945, now seen corresponding path program 4 times [2020-10-13 23:47:52,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:52,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61612227] [2020-10-13 23:47:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:52,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:57,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:47:57,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:57,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:47:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:57,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:57,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:47:57,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:57,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:57,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:57,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:57,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:57,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:47:57,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:57,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:47:57,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 23:47:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:57,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:47:57,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:47:57,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:47:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:47:57,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:47:57,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:47:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:47:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:47:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:47:57,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:47:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:47:57,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61612227] [2020-10-13 23:47:57,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:47:57,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:47:57,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267960647] [2020-10-13 23:47:57,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:47:57,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:47:57,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:47:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:47:57,482 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-13 23:47:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:47:57,624 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-13 23:47:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:47:57,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-13 23:47:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:47:57,625 INFO L225 Difference]: With dead ends: 92 [2020-10-13 23:47:57,625 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:47:57,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:47:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:47:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-13 23:47:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:47:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 23:47:57,637 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-13 23:47:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:47:57,637 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 23:47:57,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:47:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 23:47:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:47:57,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:47:57,644 INFO L422 BasicCegarLoop]: trace histogram [18, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:47:57,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:47:57,644 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:47:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:47:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash 992404139, now seen corresponding path program 5 times [2020-10-13 23:47:57,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:47:57,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479235893] [2020-10-13 23:47:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:47:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:47:57,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:47:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:48:02,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:02,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 23:48:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:02,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:02,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:02,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:02,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:02,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:02,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:02,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:02,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-10-13 23:48:02,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479235893] [2020-10-13 23:48:02,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:02,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:48:02,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830345879] [2020-10-13 23:48:02,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:48:02,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:48:02,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:48:02,830 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 16 states. [2020-10-13 23:48:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:03,142 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-13 23:48:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:48:03,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-13 23:48:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:03,144 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:48:03,144 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:48:03,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:48:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:48:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-10-13 23:48:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:48:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 23:48:03,158 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-13 23:48:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:03,158 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 23:48:03,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:48:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 23:48:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:48:03,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:03,159 INFO L422 BasicCegarLoop]: trace histogram [18, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:03,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:48:03,160 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1947668728, now seen corresponding path program 6 times [2020-10-13 23:48:03,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:03,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309770070] [2020-10-13 23:48:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:03,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:03,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:48:08,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:48:08,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:48:08,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:48:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:08,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:48:08,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:08,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:08,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:08,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:08,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:08,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:48:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:08,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:08,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:08,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:08,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:08,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:48:08,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:08,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:08,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:48:08,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:08,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:48:08,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 23:48:08,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309770070] [2020-10-13 23:48:08,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:08,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:48:08,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72089956] [2020-10-13 23:48:08,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:48:08,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:08,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:48:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:48:08,780 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-10-13 23:48:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:09,169 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 23:48:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:48:09,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 23:48:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:09,171 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:48:09,171 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:48:09,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:48:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:48:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 23:48:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:48:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 23:48:09,181 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2020-10-13 23:48:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:09,181 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 23:48:09,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:48:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 23:48:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:48:09,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:09,182 INFO L422 BasicCegarLoop]: trace histogram [18, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:09,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:48:09,183 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1488123959, now seen corresponding path program 7 times [2020-10-13 23:48:09,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:09,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101489242] [2020-10-13 23:48:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:09,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:09,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:14,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:48:14,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:48:14,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:14,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:48:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:48:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:14,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:14,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:14,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:14,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:14,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:14,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:14,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:14,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:48:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:14,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:14,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:14,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:14,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:14,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:14,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:14,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:14,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:14,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:14,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:14,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:48:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:14,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:14,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:14,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:14,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:14,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:14,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:14,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:14,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:14,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:14,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:14,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:48:14,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101489242] [2020-10-13 23:48:14,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:14,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:48:14,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984763838] [2020-10-13 23:48:14,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:48:14,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:48:14,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:48:14,488 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 22 states. [2020-10-13 23:48:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:14,713 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2020-10-13 23:48:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:48:14,716 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-13 23:48:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:14,717 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:48:14,717 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:48:14,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:48:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:48:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-13 23:48:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:48:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 23:48:14,729 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-13 23:48:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:14,730 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 23:48:14,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:48:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 23:48:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:48:14,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:14,731 INFO L422 BasicCegarLoop]: trace histogram [19, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:14,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:48:14,731 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash -128647643, now seen corresponding path program 8 times [2020-10-13 23:48:14,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:14,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666287171] [2020-10-13 23:48:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:14,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:19,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:19,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:48:19,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:19,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:48:19,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:19,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:48:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:48:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:20,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:20,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:20,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 23:48:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:20,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:20,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:20,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:48:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:20,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:20,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:20,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:20,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:20,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:48:20,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666287171] [2020-10-13 23:48:20,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:20,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:48:20,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70538492] [2020-10-13 23:48:20,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:48:20,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:48:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:48:20,054 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 23 states. [2020-10-13 23:48:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:20,286 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-10-13 23:48:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:48:20,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-10-13 23:48:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:20,287 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:48:20,288 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:48:20,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:48:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:48:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-13 23:48:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:48:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 23:48:20,301 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-13 23:48:20,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:20,301 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 23:48:20,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:48:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 23:48:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:48:20,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:20,302 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:20,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:48:20,303 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash -934554807, now seen corresponding path program 9 times [2020-10-13 23:48:20,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:20,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732212277] [2020-10-13 23:48:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:20,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:48:25,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:48:25,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:48:25,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:48:25,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:48:25,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:25,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:25,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 23:48:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:25,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:25,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:25,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:25,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:48:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:25,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:25,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:25,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:25,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:25,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:25,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:25,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:25,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:25,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-13 23:48:25,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732212277] [2020-10-13 23:48:25,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:25,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:48:25,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697356089] [2020-10-13 23:48:25,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:48:25,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:48:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:48:25,501 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 17 states. [2020-10-13 23:48:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:25,831 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2020-10-13 23:48:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:48:25,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-13 23:48:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:25,833 INFO L225 Difference]: With dead ends: 126 [2020-10-13 23:48:25,833 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:48:25,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:48:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:48:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-10-13 23:48:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:48:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 23:48:25,843 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-10-13 23:48:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:25,843 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 23:48:25,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:48:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 23:48:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:48:25,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:25,844 INFO L422 BasicCegarLoop]: trace histogram [20, 14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:25,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:48:25,845 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash 653921190, now seen corresponding path program 10 times [2020-10-13 23:48:25,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:25,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081378379] [2020-10-13 23:48:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:25,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:30,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:30,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:48:30,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:31,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:31,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 23:48:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:31,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:31,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:31,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:31,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:31,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:31,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:31,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:31,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:48:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:31,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:31,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-13 23:48:31,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081378379] [2020-10-13 23:48:31,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:31,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:48:31,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366204202] [2020-10-13 23:48:31,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:48:31,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:48:31,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:48:31,200 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 24 states. [2020-10-13 23:48:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:31,449 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2020-10-13 23:48:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:48:31,450 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-13 23:48:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:31,451 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:48:31,451 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:48:31,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:48:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:48:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-13 23:48:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:48:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 23:48:31,460 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-13 23:48:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:31,460 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 23:48:31,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:48:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 23:48:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:48:31,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:31,461 INFO L422 BasicCegarLoop]: trace histogram [21, 14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:31,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:48:31,461 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash -728750134, now seen corresponding path program 11 times [2020-10-13 23:48:31,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:31,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084132953] [2020-10-13 23:48:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:48:36,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:48:36,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:36,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:36,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:36,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:36,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:36,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:36,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:48:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:36,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:36,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:36,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:36,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:36,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:36,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:36,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:48:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:36,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:36,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:36,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:48:36,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084132953] [2020-10-13 23:48:36,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:36,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:48:36,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916290331] [2020-10-13 23:48:36,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:48:36,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:48:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:48:36,695 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 18 states. [2020-10-13 23:48:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:37,007 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2020-10-13 23:48:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:48:37,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-13 23:48:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:37,009 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:48:37,010 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 23:48:37,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:48:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 23:48:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-13 23:48:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:48:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 23:48:37,019 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-13 23:48:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:37,020 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 23:48:37,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:48:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 23:48:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:48:37,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:37,021 INFO L422 BasicCegarLoop]: trace histogram [21, 15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:37,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:48:37,021 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:37,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1556068539, now seen corresponding path program 12 times [2020-10-13 23:48:37,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:37,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541971170] [2020-10-13 23:48:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:48:42,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:48:42,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:48:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:48:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:42,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:42,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:42,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:42,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:42,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:42,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:42,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:48:42,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 23:48:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:42,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:42,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:42,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:42,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:42,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:48:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:42,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:42,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:42,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:42,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:42,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:48:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-13 23:48:42,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541971170] [2020-10-13 23:48:42,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:42,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:48:42,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542099913] [2020-10-13 23:48:42,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:48:42,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:48:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:48:42,403 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 25 states. [2020-10-13 23:48:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:42,669 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-13 23:48:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:48:42,670 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-10-13 23:48:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:42,671 INFO L225 Difference]: With dead ends: 113 [2020-10-13 23:48:42,671 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:48:42,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:48:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:48:42,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-10-13 23:48:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:48:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 23:48:42,690 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-13 23:48:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:42,690 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 23:48:42,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:48:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 23:48:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:48:42,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:42,691 INFO L422 BasicCegarLoop]: trace histogram [22, 15, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:42,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:48:42,691 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1136650857, now seen corresponding path program 13 times [2020-10-13 23:48:42,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:42,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388380908] [2020-10-13 23:48:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:42,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:42,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:47,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:48:47,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:48:47,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:47,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:47,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:47,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:47,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:47,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:47,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:47,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:47,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:47,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:47,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:47,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:47,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 23:48:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:47,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:47,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:47,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:47,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:47,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:47,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:47,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:47,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:47,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:47,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:48:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:47,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:47,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:47,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:47,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:47,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:47,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:47,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:47,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:47,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:47,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:47,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-13 23:48:47,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388380908] [2020-10-13 23:48:47,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:47,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:48:47,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866089437] [2020-10-13 23:48:47,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:48:47,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:48:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:48:47,937 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 19 states. [2020-10-13 23:48:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:48,323 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-13 23:48:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:48:48,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-10-13 23:48:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:48,325 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:48:48,325 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:48:48,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:48:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:48:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-10-13 23:48:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:48:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 23:48:48,336 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-13 23:48:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:48,337 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 23:48:48,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:48:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 23:48:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:48:48,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:48,338 INFO L422 BasicCegarLoop]: trace histogram [22, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:48,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:48:48,338 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 436787334, now seen corresponding path program 14 times [2020-10-13 23:48:48,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:48,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047501165] [2020-10-13 23:48:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:48,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:53,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:53,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:48:53,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:53,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:48:53,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:53,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:48:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:48:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:53,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:53,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:53,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:53,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:53,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:53,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:53,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:53,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 23:48:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:53,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:53,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:53,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:53,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:53,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:53,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:53,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:53,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:48:53,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:48:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:53,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:53,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:53,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:53,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:53,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:53,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:48:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:48:53,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047501165] [2020-10-13 23:48:53,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:53,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:48:53,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123920065] [2020-10-13 23:48:53,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:48:53,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:53,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:48:53,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:48:53,749 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 26 states. [2020-10-13 23:48:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:54,000 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2020-10-13 23:48:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:48:54,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-10-13 23:48:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:54,003 INFO L225 Difference]: With dead ends: 119 [2020-10-13 23:48:54,003 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:48:54,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:48:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:48:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-10-13 23:48:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:48:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 23:48:54,016 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-13 23:48:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:54,016 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 23:48:54,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:48:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 23:48:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:48:54,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:54,017 INFO L422 BasicCegarLoop]: trace histogram [23, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:54,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:48:54,017 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1725152598, now seen corresponding path program 15 times [2020-10-13 23:48:54,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:54,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785524176] [2020-10-13 23:48:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:59,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:59,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:48:59,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:48:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:48:59,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:59,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:48:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:48:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:48:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:59,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:48:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:59,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:59,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:59,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:48:59,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:59,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:48:59,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:59,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:59,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:59,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:48:59,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:59,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:59,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 23:48:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:59,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:59,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:59,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:59,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:59,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:59,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:59,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:59,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:59,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:59,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:59,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:59,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 23:48:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:59,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:48:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:48:59,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:48:59,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:48:59,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:48:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 4 proven. 276 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:48:59,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785524176] [2020-10-13 23:48:59,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:48:59,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:48:59,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969056913] [2020-10-13 23:48:59,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:48:59,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:48:59,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:48:59,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:48:59,471 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 27 states. [2020-10-13 23:48:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:48:59,651 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-13 23:48:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:48:59,652 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-10-13 23:48:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:48:59,653 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:48:59,653 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:48:59,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:48:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:48:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-10-13 23:48:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:48:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 23:48:59,666 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-13 23:48:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:48:59,666 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 23:48:59,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:48:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 23:48:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:48:59,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:48:59,667 INFO L422 BasicCegarLoop]: trace histogram [24, 16, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:48:59,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:48:59,667 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:48:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:48:59,667 INFO L82 PathProgramCache]: Analyzing trace with hash -25813754, now seen corresponding path program 16 times [2020-10-13 23:48:59,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:48:59,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554587733] [2020-10-13 23:48:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:48:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:48:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:48:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:04,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:04,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:49:04,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:04,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:49:04,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:04,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:49:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:49:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:49:04,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:04,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:04,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:04,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:04,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:04,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:04,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:04,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:04,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:04,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:04,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:04,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:04,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:49:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:49:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:04,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:04,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:04,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:04,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:04,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:04,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:04,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:04,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:04,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:49:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:04,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:04,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:04,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:04,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:04,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:49:04,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:04,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:04,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:04,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:04,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:04,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-10-13 23:49:04,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554587733] [2020-10-13 23:49:04,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:04,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:49:04,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336685874] [2020-10-13 23:49:04,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:49:04,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:49:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:49:04,942 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 20 states. [2020-10-13 23:49:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:05,347 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2020-10-13 23:49:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:49:05,347 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-13 23:49:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:05,349 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:49:05,349 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:49:05,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:49:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:49:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 73. [2020-10-13 23:49:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:49:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 23:49:05,360 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-13 23:49:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:05,360 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 23:49:05,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:49:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 23:49:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:49:05,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:05,361 INFO L422 BasicCegarLoop]: trace histogram [24, 17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:05,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:49:05,362 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:05,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1239877239, now seen corresponding path program 17 times [2020-10-13 23:49:05,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:05,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316801703] [2020-10-13 23:49:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:05,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:10,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:10,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:49:10,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:10,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:49:10,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:10,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:49:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:49:10,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:10,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:10,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:10,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:10,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:10,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:10,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:10,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:10,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:10,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:10,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:10,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:10,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:10,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 23:49:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:10,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:10,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:10,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:10,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:10,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:10,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:10,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:10,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:49:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:10,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:10,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:10,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:10,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:10,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:10,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:10,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:10,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:10,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 4 proven. 300 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-13 23:49:10,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316801703] [2020-10-13 23:49:10,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:10,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:49:10,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483316608] [2020-10-13 23:49:10,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:49:10,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:49:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:49:10,853 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 28 states. [2020-10-13 23:49:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:11,030 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2020-10-13 23:49:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:49:11,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-13 23:49:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:11,032 INFO L225 Difference]: With dead ends: 123 [2020-10-13 23:49:11,032 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:49:11,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:49:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:49:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-13 23:49:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:49:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 23:49:11,049 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-13 23:49:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 23:49:11,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:49:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 23:49:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:49:11,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:11,051 INFO L422 BasicCegarLoop]: trace histogram [25, 17, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:11,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:49:11,052 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash -262820635, now seen corresponding path program 18 times [2020-10-13 23:49:11,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:11,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357547740] [2020-10-13 23:49:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:16,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:49:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:49:16,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:16,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:16,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:16,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:16,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:16,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:16,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:16,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:16,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:16,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:16,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:16,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 23:49:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:16,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:16,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:16,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:16,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:16,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:16,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:16,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:16,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 23:49:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:16,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:16,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:16,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-10-13 23:49:16,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357547740] [2020-10-13 23:49:16,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:16,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:49:16,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359015940] [2020-10-13 23:49:16,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:49:16,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:49:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:49:16,385 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 21 states. [2020-10-13 23:49:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:16,813 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2020-10-13 23:49:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:49:16,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-10-13 23:49:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:16,815 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:49:16,815 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:49:16,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:49:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:49:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 75. [2020-10-13 23:49:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:49:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-13 23:49:16,825 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-13 23:49:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:16,825 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-13 23:49:16,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:49:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-13 23:49:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:49:16,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:16,826 INFO L422 BasicCegarLoop]: trace histogram [25, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:16,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:49:16,826 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:16,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2844042, now seen corresponding path program 19 times [2020-10-13 23:49:16,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:16,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695767484] [2020-10-13 23:49:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:16,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:21,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:21,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:49:21,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:21,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:49:21,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:21,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:21,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:49:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:21,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:49:21,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:22,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:22,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:22,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:49:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:22,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:22,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:22,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:22,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:22,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:22,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:22,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:22,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:22,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:22,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:22,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:22,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:49:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:22,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:22,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:22,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 4 proven. 325 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:49:22,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695767484] [2020-10-13 23:49:22,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:22,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:49:22,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205400260] [2020-10-13 23:49:22,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:49:22,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:49:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:49:22,324 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 29 states. [2020-10-13 23:49:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:22,638 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-13 23:49:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:49:22,638 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-10-13 23:49:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:22,639 INFO L225 Difference]: With dead ends: 126 [2020-10-13 23:49:22,639 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:49:22,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:49:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:49:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-13 23:49:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:49:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 23:49:22,662 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-13 23:49:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:22,662 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 23:49:22,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:49:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 23:49:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:49:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:22,666 INFO L422 BasicCegarLoop]: trace histogram [26, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:22,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:49:22,666 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1643597338, now seen corresponding path program 20 times [2020-10-13 23:49:22,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:22,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488895612] [2020-10-13 23:49:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:22,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:22,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:27,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:49:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:49:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:28,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:28,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:28,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:28,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:49:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:28,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:28,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:28,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:28,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 4 proven. 351 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:49:28,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488895612] [2020-10-13 23:49:28,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:28,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:49:28,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779419745] [2020-10-13 23:49:28,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:49:28,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:28,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:49:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:49:28,228 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 30 states. [2020-10-13 23:49:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:28,528 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-10-13 23:49:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:49:28,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 73 [2020-10-13 23:49:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:28,529 INFO L225 Difference]: With dead ends: 127 [2020-10-13 23:49:28,529 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:49:28,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:49:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:49:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-13 23:49:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:49:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 23:49:28,540 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-13 23:49:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:28,541 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 23:49:28,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:49:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 23:49:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:49:28,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:28,542 INFO L422 BasicCegarLoop]: trace histogram [27, 18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:28,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:49:28,542 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1143672566, now seen corresponding path program 21 times [2020-10-13 23:49:28,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:28,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411770597] [2020-10-13 23:49:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:28,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:49:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:49:33,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:49:33,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:33,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:33,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:33,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:33,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:33,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:33,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:33,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:33,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 23:49:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:33,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:33,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:49:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:33,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:33,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:33,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:33,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-10-13 23:49:33,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411770597] [2020-10-13 23:49:33,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:33,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:49:33,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916592884] [2020-10-13 23:49:33,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:49:33,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:49:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:49:33,846 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 22 states. [2020-10-13 23:49:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:34,252 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-10-13 23:49:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:49:34,259 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-13 23:49:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:34,260 INFO L225 Difference]: With dead ends: 153 [2020-10-13 23:49:34,260 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:49:34,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:49:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:49:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-10-13 23:49:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:49:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 23:49:34,272 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-13 23:49:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:34,272 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 23:49:34,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:49:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 23:49:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:49:34,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:34,273 INFO L422 BasicCegarLoop]: trace histogram [27, 19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:34,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:49:34,273 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1533762043, now seen corresponding path program 22 times [2020-10-13 23:49:34,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:34,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225846326] [2020-10-13 23:49:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:34,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:34,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:39,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:39,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:49:39,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:39,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:49:39,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:39,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:39,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:49:39,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:39,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:49:39,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:40,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:40,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:40,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:40,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:40,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:49:40,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:40,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:40,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:40,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:40,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:49:40,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 23:49:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:40,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:40,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:40,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:40,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:40,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:40,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:49:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:40,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:40,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:40,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:40,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:40,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:40,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:40,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:40,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:40,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 4 proven. 378 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-10-13 23:49:40,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225846326] [2020-10-13 23:49:40,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:40,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:49:40,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39147278] [2020-10-13 23:49:40,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:49:40,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:40,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:49:40,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:49:40,049 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-13 23:49:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:40,469 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-13 23:49:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:49:40,470 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-13 23:49:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:40,471 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:49:40,471 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:49:40,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:49:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:49:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-10-13 23:49:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:49:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 23:49:40,489 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-13 23:49:40,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:40,490 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 23:49:40,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:49:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 23:49:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:49:40,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:40,492 INFO L422 BasicCegarLoop]: trace histogram [28, 19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:40,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:49:40,492 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2142393303, now seen corresponding path program 23 times [2020-10-13 23:49:40,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:40,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395852925] [2020-10-13 23:49:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:40,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:49:45,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:45,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:49:45,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:45,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:49:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:49:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:49:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:45,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:45,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:45,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:45,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:45,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:45,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:45,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:45,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 23:49:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:45,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:45,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:45,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:45,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:45,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:45,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:45,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:45,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:45,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 23:49:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:45,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:45,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:45,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:45,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:45,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:45,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-13 23:49:45,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395852925] [2020-10-13 23:49:45,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:45,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:49:45,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592405277] [2020-10-13 23:49:45,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:49:45,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:49:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:49:45,895 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 23 states. [2020-10-13 23:49:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:46,643 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2020-10-13 23:49:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:49:46,644 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-13 23:49:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:46,645 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:49:46,646 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 23:49:46,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:49:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 23:49:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 80. [2020-10-13 23:49:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:49:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 23:49:46,666 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-13 23:49:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:46,667 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 23:49:46,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:49:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 23:49:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:49:46,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:46,668 INFO L422 BasicCegarLoop]: trace histogram [28, 20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:46,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:49:46,669 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1865633478, now seen corresponding path program 24 times [2020-10-13 23:49:46,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:46,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169422510] [2020-10-13 23:49:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:46,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:51,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:51,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:49:51,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:52,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:52,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:52,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:52,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:49:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:52,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:52,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:52,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:52,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:52,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:52,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:52,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:52,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:52,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:52,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:52,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 23:49:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:52,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:52,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:52,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:52,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:52,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:52,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:52,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:52,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:49:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 4 proven. 406 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-13 23:49:52,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169422510] [2020-10-13 23:49:52,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:52,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:49:52,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913087729] [2020-10-13 23:49:52,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:49:52,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:49:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:49:52,364 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2020-10-13 23:49:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:52,681 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-10-13 23:49:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:49:52,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2020-10-13 23:49:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:52,682 INFO L225 Difference]: With dead ends: 133 [2020-10-13 23:49:52,682 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:49:52,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:49:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:49:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-13 23:49:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:49:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-13 23:49:52,693 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-13 23:49:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:52,694 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-13 23:49:52,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:49:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-13 23:49:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:49:52,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:52,695 INFO L422 BasicCegarLoop]: trace histogram [29, 20, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:52,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:49:52,695 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1086544874, now seen corresponding path program 25 times [2020-10-13 23:49:52,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:52,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996804544] [2020-10-13 23:49:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:52,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:57,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:57,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:49:57,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:49:57,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:49:57,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:57,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:49:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:49:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:49:57,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:58,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:49:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:58,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:58,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:58,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:49:58,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:58,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:49:58,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:58,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:58,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:58,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:49:58,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:58,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:58,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 23:49:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:58,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:58,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:58,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:49:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:58,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:49:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:49:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:49:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:49:58,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:49:58,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:49:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:49:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:49:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:49:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:49:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-10-13 23:49:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996804544] [2020-10-13 23:49:58,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:49:58,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:49:58,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711396566] [2020-10-13 23:49:58,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:49:58,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:49:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:49:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:49:58,076 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 24 states. [2020-10-13 23:49:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:49:58,565 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2020-10-13 23:49:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:49:58,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-13 23:49:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:49:58,566 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:49:58,566 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:49:58,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:49:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:49:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 82. [2020-10-13 23:49:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:49:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 23:49:58,576 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-13 23:49:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:49:58,577 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 23:49:58,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:49:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 23:49:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:49:58,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:49:58,578 INFO L422 BasicCegarLoop]: trace histogram [29, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:49:58,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:49:58,578 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:49:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:49:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1116498139, now seen corresponding path program 26 times [2020-10-13 23:49:58,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:49:58,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763233241] [2020-10-13 23:49:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:49:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:49:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:49:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:03,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:50:03,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:50:03,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:50:03,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:04,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:04,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:04,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:04,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:04,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 23:50:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:04,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:04,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:04,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-13 23:50:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:04,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 4 proven. 435 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:50:04,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763233241] [2020-10-13 23:50:04,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:04,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:50:04,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694710880] [2020-10-13 23:50:04,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:50:04,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:50:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:50:04,265 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 33 states. [2020-10-13 23:50:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:04,641 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2020-10-13 23:50:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:50:04,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2020-10-13 23:50:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:04,643 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:50:04,644 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:50:04,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:50:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:50:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-13 23:50:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:50:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 23:50:04,662 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-13 23:50:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:04,663 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 23:50:04,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:50:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 23:50:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:50:04,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:04,664 INFO L422 BasicCegarLoop]: trace histogram [30, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:04,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 23:50:04,665 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1798630217, now seen corresponding path program 27 times [2020-10-13 23:50:04,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:04,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630614768] [2020-10-13 23:50:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:04,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:09,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:09,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:50:09,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:50:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:10,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:10,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:10,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:10,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:50:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:10,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:10,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:10,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 23:50:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:10,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:10,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:10,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:10,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 4 proven. 465 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 23:50:10,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630614768] [2020-10-13 23:50:10,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:10,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:50:10,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926385934] [2020-10-13 23:50:10,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:50:10,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:50:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:50:10,373 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-13 23:50:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:10,698 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2020-10-13 23:50:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:50:10,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-10-13 23:50:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:10,702 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:50:10,702 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:50:10,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:50:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:50:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-10-13 23:50:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:50:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 23:50:10,718 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-13 23:50:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:10,718 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 23:50:10,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:50:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 23:50:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:50:10,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:10,720 INFO L422 BasicCegarLoop]: trace histogram [31, 21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:10,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 23:50:10,721 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1973296037, now seen corresponding path program 28 times [2020-10-13 23:50:10,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:10,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676411357] [2020-10-13 23:50:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:11,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:15,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:15,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:50:15,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:50:15,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:16,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:16,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:16,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:16,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:16,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:16,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:16,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:50:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:16,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:16,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:16,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:16,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-13 23:50:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:16,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:16,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:16,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:16,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:16,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 23:50:16,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676411357] [2020-10-13 23:50:16,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:16,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:50:16,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072546362] [2020-10-13 23:50:16,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:50:16,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:50:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:50:16,148 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 25 states. [2020-10-13 23:50:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:16,645 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2020-10-13 23:50:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:50:16,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-13 23:50:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:16,648 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:50:16,648 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:50:16,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:50:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:50:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2020-10-13 23:50:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:50:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-13 23:50:16,661 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-13 23:50:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:16,661 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-13 23:50:16,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:50:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-13 23:50:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:50:16,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:16,662 INFO L422 BasicCegarLoop]: trace histogram [31, 22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:16,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 23:50:16,662 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:16,663 INFO L82 PathProgramCache]: Analyzing trace with hash 602984138, now seen corresponding path program 29 times [2020-10-13 23:50:16,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:16,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870118536] [2020-10-13 23:50:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:16,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:21,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:50:21,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:50:21,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:50:21,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:22,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:22,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:22,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:22,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:22,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:22,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 23:50:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:22,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:22,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:22,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:22,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:22,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:22,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:22,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:22,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:22,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:22,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:22,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:50:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:22,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:22,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:22,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:22,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 4 proven. 496 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-13 23:50:22,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870118536] [2020-10-13 23:50:22,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:22,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:50:22,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320177095] [2020-10-13 23:50:22,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:50:22,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:22,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:50:22,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:50:22,404 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 35 states. [2020-10-13 23:50:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:22,773 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2020-10-13 23:50:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:50:22,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 82 [2020-10-13 23:50:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:22,775 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:50:22,775 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:50:22,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:50:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:50:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-10-13 23:50:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:50:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 23:50:22,785 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-13 23:50:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:22,785 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 23:50:22,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:50:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 23:50:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:50:22,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:22,786 INFO L422 BasicCegarLoop]: trace histogram [32, 22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:22,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 23:50:22,787 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash 953112614, now seen corresponding path program 30 times [2020-10-13 23:50:22,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:22,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981576019] [2020-10-13 23:50:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:22,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:50:27,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:50:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:50:27,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:28,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:28,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:28,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:28,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:28,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:28,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:28,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-13 23:50:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:28,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:28,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:28,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:28,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:28,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:28,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:28,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 23:50:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:28,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:28,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:28,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:50:28,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:28,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:50:28,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-10-13 23:50:28,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981576019] [2020-10-13 23:50:28,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:28,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:50:28,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2729992] [2020-10-13 23:50:28,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:50:28,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:50:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:50:28,213 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 26 states. [2020-10-13 23:50:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:28,746 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2020-10-13 23:50:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:50:28,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-10-13 23:50:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:28,749 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:50:28,751 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:50:28,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:50:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:50:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-13 23:50:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 23:50:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-13 23:50:28,765 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-13 23:50:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:28,766 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-13 23:50:28,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:50:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-13 23:50:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:50:28,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:28,767 INFO L422 BasicCegarLoop]: trace histogram [32, 23, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:28,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 23:50:28,767 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -957930903, now seen corresponding path program 31 times [2020-10-13 23:50:28,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:28,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693626464] [2020-10-13 23:50:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:28,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking...