/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:46:14,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:46:14,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:46:15,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:46:15,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:46:15,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:46:15,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:46:15,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:46:15,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:46:15,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:46:15,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:46:15,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:46:15,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:46:15,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:46:15,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:46:15,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:46:15,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:46:15,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:46:15,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:46:15,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:46:15,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:46:15,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:46:15,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:46:15,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:46:15,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:46:15,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:46:15,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:46:15,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:46:15,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:46:15,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:46:15,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:46:15,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:46:15,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:46:15,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:46:15,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:46:15,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:46:15,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:46:15,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:46:15,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:46:15,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:46:15,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:46:15,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:46:15,076 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:46:15,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:46:15,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:46:15,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:46:15,078 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:46:15,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:46:15,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:46:15,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:46:15,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:46:15,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:46:15,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:46:15,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:46:15,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:46:15,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:46:15,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:46:15,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:46:15,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:46:15,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:46:15,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:46:15,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:46:15,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:46:15,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:46:15,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:46:15,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:46:15,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:46:15,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:46:15,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:46:15,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:46:15,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:46:15,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:46:15,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:46:15,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:46:15,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:46:15,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:46:15,435 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:46:15,436 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-14 23:46:15,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae5f879e6/465baf6ea5374de696644ef081717982/FLAGfa2fe8ee9 [2020-10-14 23:46:16,016 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:46:16,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-14 23:46:16,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae5f879e6/465baf6ea5374de696644ef081717982/FLAGfa2fe8ee9 [2020-10-14 23:46:16,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae5f879e6/465baf6ea5374de696644ef081717982 [2020-10-14 23:46:16,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:46:16,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:46:16,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:46:16,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:46:16,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:46:16,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae769c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16, skipping insertion in model container [2020-10-14 23:46:16,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:46:16,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:46:16,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:46:16,720 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:46:16,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:46:16,745 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:46:16,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16 WrapperNode [2020-10-14 23:46:16,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:46:16,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:46:16,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:46:16,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:46:16,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... [2020-10-14 23:46:16,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:46:16,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:46:16,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:46:16,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:46:16,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:46:16,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:46:16,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:46:16,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:46:16,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:46:16,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:46:16,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:46:16,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:46:16,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:46:16,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:46:17,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:46:17,122 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:46:17,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:46:17 BoogieIcfgContainer [2020-10-14 23:46:17,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:46:17,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:46:17,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:46:17,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:46:17,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:46:16" (1/3) ... [2020-10-14 23:46:17,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7803f67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:46:17, skipping insertion in model container [2020-10-14 23:46:17,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:46:16" (2/3) ... [2020-10-14 23:46:17,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7803f67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:46:17, skipping insertion in model container [2020-10-14 23:46:17,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:46:17" (3/3) ... [2020-10-14 23:46:17,134 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-10-14 23:46:17,146 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:46:17,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:46:17,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:46:17,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:46:17,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:46:17,193 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:46:17,193 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:46:17,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:46:17,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:46:17,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:46:17,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:46:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-14 23:46:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:46:17,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:17,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:17,216 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-10-14 23:46:17,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:17,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082059746] [2020-10-14 23:46:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:17,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:17,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:46:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 23:46:17,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:17,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:17,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:46:17,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:17,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:46:17,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 23:46:18,064 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 15 [2020-10-14 23:46:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:18,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:18,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:18,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:18,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:18,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:18,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:18,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082059746] [2020-10-14 23:46:18,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:46:18,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:46:18,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587021479] [2020-10-14 23:46:18,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:46:18,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:46:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:46:18,130 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-14 23:46:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:18,284 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2020-10-14 23:46:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:46:18,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 23:46:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:18,297 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:46:18,298 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:46:18,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:46:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-14 23:46:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:46:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 23:46:18,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 23:46:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:18,359 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 23:46:18,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:46:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 23:46:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:46:18,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:18,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:18,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:46:18,363 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2020-10-14 23:46:18,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:18,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648829435] [2020-10-14 23:46:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:18,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:18,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:46:18,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:18,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 23:46:18,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:18,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:46:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:18,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:46:18,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:18,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:18,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:18,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:18,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:18,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:46:18,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:18,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:18,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:46:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:18,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648829435] [2020-10-14 23:46:18,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:18,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:46:18,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718479199] [2020-10-14 23:46:18,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:46:18,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:46:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:18,685 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-14 23:46:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:18,724 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-14 23:46:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:46:18,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-14 23:46:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:18,726 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:46:18,726 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 23:46:18,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:46:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 23:46:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 23:46:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:46:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 23:46:18,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-14 23:46:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:18,734 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 23:46:18,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:46:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 23:46:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:46:18,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:18,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:18,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:46:18,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1541372241, now seen corresponding path program 2 times [2020-10-14 23:46:18,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:18,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62068455] [2020-10-14 23:46:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:18,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:19,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:46:19,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:46:19,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-14 23:46:19,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:19,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:46:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:19,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:46:19,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:19,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:19,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:19,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:19,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:19,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:19,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:19,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:19,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:19,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:19,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:19,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62068455] [2020-10-14 23:46:19,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:19,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:46:19,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899039354] [2020-10-14 23:46:19,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:46:19,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:19,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:46:19,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:46:19,458 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-14 23:46:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:19,576 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-14 23:46:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:46:19,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-14 23:46:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:19,577 INFO L225 Difference]: With dead ends: 27 [2020-10-14 23:46:19,577 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:46:19,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:46:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-14 23:46:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:46:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-14 23:46:19,592 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-14 23:46:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:19,592 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-14 23:46:19,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:46:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-14 23:46:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:46:19,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:19,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:19,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:46:19,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1965649064, now seen corresponding path program 3 times [2020-10-14 23:46:19,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:19,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924100073] [2020-10-14 23:46:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:19,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:46:20,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:46:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-14 23:46:20,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:46:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:46:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:20,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:20,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:20,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:20,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:20,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:20,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:20,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:20,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924100073] [2020-10-14 23:46:20,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:20,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:46:20,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588063876] [2020-10-14 23:46:20,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:46:20,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:46:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:20,264 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-14 23:46:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:20,307 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-14 23:46:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:46:20,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-14 23:46:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:20,308 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:46:20,308 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:46:20,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:46:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:46:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-14 23:46:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:46:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-14 23:46:20,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2020-10-14 23:46:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:20,316 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-14 23:46:20,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:46:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-14 23:46:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:46:20,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:20,318 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:20,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:46:20,318 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash -262903823, now seen corresponding path program 4 times [2020-10-14 23:46:20,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:20,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663934418] [2020-10-14 23:46:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:21,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:46:21,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:46:21,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1666 [2020-10-14 23:46:21,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:21,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:46:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:46:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:22,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:22,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:22,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:22,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:22,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:22,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663934418] [2020-10-14 23:46:22,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:22,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:46:22,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534221264] [2020-10-14 23:46:22,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:46:22,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:46:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:22,209 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 9 states. [2020-10-14 23:46:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:22,335 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-14 23:46:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:46:22,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 23:46:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:22,337 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:46:22,337 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:46:22,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:46:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:46:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-14 23:46:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:46:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-14 23:46:22,346 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2020-10-14 23:46:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:22,347 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-14 23:46:22,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:46:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-14 23:46:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:46:22,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:22,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:22,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:46:22,349 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1638162248, now seen corresponding path program 5 times [2020-10-14 23:46:22,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:22,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857677776] [2020-10-14 23:46:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:22,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:25,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:46:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:46:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3057 [2020-10-14 23:46:25,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:25,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:46:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:46:25,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:25,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:25,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:25,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:25,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:25,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:25,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:25,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857677776] [2020-10-14 23:46:25,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:25,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:46:25,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969944657] [2020-10-14 23:46:25,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:46:25,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:46:25,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:25,523 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-10-14 23:46:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:25,604 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-14 23:46:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:46:25,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-14 23:46:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:25,606 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:46:25,606 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:46:25,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:46:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:46:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 23:46:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:46:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-14 23:46:25,614 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2020-10-14 23:46:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:25,614 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-14 23:46:25,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:46:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-14 23:46:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:46:25,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:25,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:25,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:46:25,616 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:25,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2026102417, now seen corresponding path program 6 times [2020-10-14 23:46:25,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:25,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740075462] [2020-10-14 23:46:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:25,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:25,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:29,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:30,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:46:30,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:46:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 23:46:30,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:30,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:30,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:46:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:30,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:46:30,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:30,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:30,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:30,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:30,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740075462] [2020-10-14 23:46:30,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:30,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:46:30,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030350698] [2020-10-14 23:46:30,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:46:30,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:30,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:46:30,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:30,812 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2020-10-14 23:46:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:30,912 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-14 23:46:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:46:30,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-14 23:46:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:30,915 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:46:30,915 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:46:30,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:46:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:46:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-14 23:46:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 23:46:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-14 23:46:30,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 28 [2020-10-14 23:46:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:30,934 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-14 23:46:30,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:46:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-14 23:46:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:46:30,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:30,936 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:30,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:46:30,937 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1049025000, now seen corresponding path program 7 times [2020-10-14 23:46:30,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:30,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485475141] [2020-10-14 23:46:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:30,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:35,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:35,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:46:35,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:46:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:46:35,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:35,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:46:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:35,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:46:35,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:36,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:36,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:36,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:36,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:36,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:36,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:36,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:36,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:36,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:36,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:36,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:36,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485475141] [2020-10-14 23:46:36,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:36,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:46:36,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562053164] [2020-10-14 23:46:36,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:46:36,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:36,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:46:36,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:46:36,105 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-10-14 23:46:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:36,241 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-14 23:46:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:46:36,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-14 23:46:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:36,243 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:46:36,243 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:46:36,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:46:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:46:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-14 23:46:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:46:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-14 23:46:36,256 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 31 [2020-10-14 23:46:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:36,257 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-14 23:46:36,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:46:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-14 23:46:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:46:36,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:36,258 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:36,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:46:36,259 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash -517481167, now seen corresponding path program 8 times [2020-10-14 23:46:36,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:36,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777261430] [2020-10-14 23:46:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:41,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:46:41,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:46:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:46:41,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:41,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:46:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:46:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:41,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:41,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:41,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:41,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:41,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:41,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:41,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:41,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:41,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:41,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:41,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:41,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777261430] [2020-10-14 23:46:41,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:41,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:46:41,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93634239] [2020-10-14 23:46:41,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:46:41,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:46:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:46:41,439 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 11 states. [2020-10-14 23:46:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:41,561 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-14 23:46:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:46:41,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 23:46:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:41,563 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:46:41,563 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:46:41,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:46:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:46:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-14 23:46:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:46:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-14 23:46:41,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 34 [2020-10-14 23:46:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:41,578 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-14 23:46:41,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:46:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-14 23:46:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:46:41,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:41,580 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:41,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:46:41,581 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:41,581 INFO L82 PathProgramCache]: Analyzing trace with hash -839572616, now seen corresponding path program 9 times [2020-10-14 23:46:41,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:41,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864813360] [2020-10-14 23:46:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:41,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:41,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:42,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:46,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:46:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:46:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:46,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:46,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:46,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:46,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:46,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:46,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:46,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:46,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:46,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864813360] [2020-10-14 23:46:46,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:46,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:46:46,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378830420] [2020-10-14 23:46:46,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:46:46,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:46:46,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:46:46,763 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 12 states. [2020-10-14 23:46:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:46,909 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-14 23:46:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:46:46,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-14 23:46:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:46,913 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:46:46,913 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:46:46,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:46:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:46:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-14 23:46:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:46:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-14 23:46:46,927 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 37 [2020-10-14 23:46:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:46,930 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-14 23:46:46,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:46:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-14 23:46:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:46:46,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:46,936 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:46,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:46:46,936 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1308990511, now seen corresponding path program 10 times [2020-10-14 23:46:46,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:46,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89117456] [2020-10-14 23:46:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:46,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:47,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:48,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:51,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:51,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:46:51,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 23:46:51,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:46:51,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:51,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:46:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:46:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:52,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:52,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:52,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:46:52,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:52,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:52,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:52,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:52,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89117456] [2020-10-14 23:46:52,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:52,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:46:52,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766701262] [2020-10-14 23:46:52,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:46:52,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:46:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:46:52,140 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 13 states. [2020-10-14 23:46:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:52,309 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-14 23:46:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:46:52,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-14 23:46:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:52,311 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:46:52,311 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:46:52,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:46:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:46:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-14 23:46:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:46:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-14 23:46:52,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 40 [2020-10-14 23:46:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:52,318 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-14 23:46:52,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:46:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-14 23:46:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 23:46:52,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:52,320 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:52,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:46:52,320 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1323984680, now seen corresponding path program 11 times [2020-10-14 23:46:52,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:52,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090734050] [2020-10-14 23:46:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:54,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:57,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:46:57,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 23:46:57,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:46:57,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:57,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:57,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:46:57,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:46:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:46:57,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:57,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:57,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:46:57,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:46:57,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:57,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:57,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:57,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:57,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090734050] [2020-10-14 23:46:57,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:57,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:46:57,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6481514] [2020-10-14 23:46:57,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:46:57,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:46:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:46:57,520 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 14 states. [2020-10-14 23:46:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:57,708 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-14 23:46:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:46:57,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-14 23:46:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:57,710 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:46:57,710 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:46:57,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:46:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:46:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-14 23:46:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:46:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-14 23:46:57,721 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 43 [2020-10-14 23:46:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:57,721 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-14 23:46:57,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:46:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-14 23:46:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:46:57,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:57,722 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:57,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:46:57,723 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1338674575, now seen corresponding path program 12 times [2020-10-14 23:46:57,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:57,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831575159] [2020-10-14 23:46:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:57,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:57,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:58,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:02,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:47:02,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 23:47:02,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:47:02,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:02,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:02,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:47:02,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 23:47:02,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:47:02,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:02,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:02,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:02,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:02,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:02,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:02,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:02,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:02,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:02,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:02,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:02,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-14 23:47:02,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831575159] [2020-10-14 23:47:02,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:47:02,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:47:02,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194184946] [2020-10-14 23:47:02,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:47:02,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:47:02,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:47:02,767 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 3 states. [2020-10-14 23:47:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:02,777 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2020-10-14 23:47:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:47:02,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-10-14 23:47:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:02,778 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:47:02,778 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:47:02,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:47:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:47:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 23:47:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:47:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-14 23:47:02,786 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 46 [2020-10-14 23:47:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:02,786 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-14 23:47:02,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:47:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-14 23:47:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:47:02,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:02,788 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:02,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:47:02,788 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1293605117, now seen corresponding path program 1 times [2020-10-14 23:47:02,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:02,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422386571] [2020-10-14 23:47:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:02,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:06,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:07,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:47:07,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 23:47:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:07,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:07,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:07,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 1 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-10-14 23:47:07,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422386571] [2020-10-14 23:47:07,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:07,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:47:07,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848178613] [2020-10-14 23:47:07,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:47:07,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:07,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:47:07,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:47:07,838 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 4 states. [2020-10-14 23:47:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:07,858 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2020-10-14 23:47:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:47:07,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 23:47:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:07,859 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:47:07,859 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:47:07,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:47:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:47:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 23:47:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 23:47:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-10-14 23:47:07,868 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 58 [2020-10-14 23:47:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:07,868 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-10-14 23:47:07,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:47:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-10-14 23:47:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:47:07,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:07,869 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:07,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:47:07,870 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:07,870 INFO L82 PathProgramCache]: Analyzing trace with hash 593556721, now seen corresponding path program 2 times [2020-10-14 23:47:07,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:07,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206217615] [2020-10-14 23:47:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:08,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:12,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:12,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 23:47:12,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:12,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:47:12,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:12,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:47:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 23:47:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:47:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:12,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:12,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:12,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:12,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:12,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:12,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:12,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:12,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:12,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 378 proven. 3 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-10-14 23:47:12,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206217615] [2020-10-14 23:47:12,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:12,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:47:12,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563267730] [2020-10-14 23:47:12,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:47:12,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:12,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:47:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:47:12,948 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 5 states. [2020-10-14 23:47:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:12,972 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2020-10-14 23:47:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:47:12,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 23:47:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:12,984 INFO L225 Difference]: With dead ends: 145 [2020-10-14 23:47:12,984 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:47:12,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:47:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:47:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 23:47:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:47:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-14 23:47:12,998 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 70 [2020-10-14 23:47:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:12,998 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-14 23:47:12,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:47:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-14 23:47:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 23:47:12,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:12,999 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:12,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:47:12,999 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash 150739325, now seen corresponding path program 3 times [2020-10-14 23:47:13,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:13,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531144938] [2020-10-14 23:47:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:18,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 23:47:18,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:18,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:47:18,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:18,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:47:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 23:47:18,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:47:18,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:18,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:18,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:18,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:18,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:18,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:18,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:18,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:18,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:18,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:18,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:18,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 699 proven. 6 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-10-14 23:47:18,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531144938] [2020-10-14 23:47:18,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:18,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:47:18,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343634249] [2020-10-14 23:47:18,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:47:18,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:47:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:47:18,077 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 6 states. [2020-10-14 23:47:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:18,107 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-14 23:47:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:47:18,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 23:47:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:18,109 INFO L225 Difference]: With dead ends: 168 [2020-10-14 23:47:18,109 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:47:18,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:47:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:47:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-14 23:47:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:47:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-14 23:47:18,122 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 82 [2020-10-14 23:47:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:18,122 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-14 23:47:18,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:47:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-14 23:47:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:47:18,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:18,123 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:18,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:47:18,123 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:18,124 INFO L82 PathProgramCache]: Analyzing trace with hash -865380495, now seen corresponding path program 4 times [2020-10-14 23:47:18,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:18,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159592561] [2020-10-14 23:47:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:18,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:20,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:23,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:47:23,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:23,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 23:47:23,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:23,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:23,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:47:23,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 23:47:23,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:47:23,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:23,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:23,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:23,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:23,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:23,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:23,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 938 proven. 10 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-10-14 23:47:23,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159592561] [2020-10-14 23:47:23,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:23,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:47:23,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013006724] [2020-10-14 23:47:23,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:47:23,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:47:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:47:23,211 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 7 states. [2020-10-14 23:47:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:23,250 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2020-10-14 23:47:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:47:23,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-14 23:47:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:23,252 INFO L225 Difference]: With dead ends: 191 [2020-10-14 23:47:23,252 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:47:23,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:47:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:47:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 23:47:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:47:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-10-14 23:47:23,264 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 94 [2020-10-14 23:47:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:23,264 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-10-14 23:47:23,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:47:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-10-14 23:47:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 23:47:23,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:23,265 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:23,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:47:23,266 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash 700709373, now seen corresponding path program 5 times [2020-10-14 23:47:23,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:23,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737342481] [2020-10-14 23:47:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:28,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:47:28,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:47:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:28,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:28,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:28,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:28,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:28,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:28,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:28,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:28,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:28,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 1479 proven. 15 refuted. 0 times theorem prover too weak. 1206 trivial. 0 not checked. [2020-10-14 23:47:28,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737342481] [2020-10-14 23:47:28,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:28,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:47:28,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203986292] [2020-10-14 23:47:28,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:47:28,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:47:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:47:28,394 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 8 states. [2020-10-14 23:47:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:28,479 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2020-10-14 23:47:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:47:28,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-14 23:47:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:28,481 INFO L225 Difference]: With dead ends: 214 [2020-10-14 23:47:28,481 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 23:47:28,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:47:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 23:47:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-14 23:47:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:47:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2020-10-14 23:47:28,501 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 106 [2020-10-14 23:47:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:28,501 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2020-10-14 23:47:28,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:47:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2020-10-14 23:47:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 23:47:28,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:28,504 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:28,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:47:28,504 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1881446897, now seen corresponding path program 6 times [2020-10-14 23:47:28,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:28,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324060928] [2020-10-14 23:47:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:28,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:47:33,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:33,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 23:47:33,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:47:33,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 23:47:33,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:47:33,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:33,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:33,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:33,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:33,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:33,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:33,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 1062 proven. 21 refuted. 0 times theorem prover too weak. 2547 trivial. 0 not checked. [2020-10-14 23:47:33,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324060928] [2020-10-14 23:47:33,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:33,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:47:33,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424638894] [2020-10-14 23:47:33,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:47:33,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:33,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:47:33,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:47:33,672 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 9 states. [2020-10-14 23:47:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:33,745 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2020-10-14 23:47:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:47:33,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-14 23:47:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:33,747 INFO L225 Difference]: With dead ends: 237 [2020-10-14 23:47:33,747 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 23:47:33,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:47:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 23:47:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-14 23:47:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 23:47:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2020-10-14 23:47:33,766 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 118 [2020-10-14 23:47:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:33,766 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2020-10-14 23:47:33,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:47:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2020-10-14 23:47:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 23:47:33,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:33,774 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:33,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:47:33,774 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2137160317, now seen corresponding path program 7 times [2020-10-14 23:47:33,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:33,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815253398] [2020-10-14 23:47:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:34,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:38,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:38,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 23:47:38,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:38,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 23:47:38,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:38,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:38,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:47:38,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 23:47:38,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:47:38,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:38,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:38,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:38,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:38,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:38,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:38,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:38,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:38,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:38,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:38,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:38,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:38,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1906 proven. 28 refuted. 0 times theorem prover too weak. 2770 trivial. 0 not checked. [2020-10-14 23:47:38,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815253398] [2020-10-14 23:47:38,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:38,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:47:38,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310329610] [2020-10-14 23:47:38,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:47:38,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:47:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:47:38,937 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand 10 states. [2020-10-14 23:47:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:39,015 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2020-10-14 23:47:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:47:39,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 130 [2020-10-14 23:47:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:39,017 INFO L225 Difference]: With dead ends: 260 [2020-10-14 23:47:39,018 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 23:47:39,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:47:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 23:47:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-14 23:47:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:47:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-14 23:47:39,035 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 130 [2020-10-14 23:47:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:39,035 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-14 23:47:39,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:47:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-14 23:47:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 23:47:39,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:39,036 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:39,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:47:39,036 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1834794097, now seen corresponding path program 8 times [2020-10-14 23:47:39,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:39,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892322921] [2020-10-14 23:47:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:47:44,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:44,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:44,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:44,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:44,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:44,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:44,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:44,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 2399 proven. 36 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2020-10-14 23:47:44,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892322921] [2020-10-14 23:47:44,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:44,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:47:44,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49274358] [2020-10-14 23:47:44,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:47:44,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:44,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:47:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:47:44,211 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 11 states. [2020-10-14 23:47:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:44,295 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2020-10-14 23:47:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:47:44,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 142 [2020-10-14 23:47:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:44,297 INFO L225 Difference]: With dead ends: 283 [2020-10-14 23:47:44,297 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 23:47:44,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:47:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 23:47:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-14 23:47:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 23:47:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2020-10-14 23:47:44,310 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 142 [2020-10-14 23:47:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:44,310 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2020-10-14 23:47:44,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:47:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2020-10-14 23:47:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 23:47:44,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:44,312 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:44,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:47:44,312 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 533175037, now seen corresponding path program 9 times [2020-10-14 23:47:44,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:44,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565832952] [2020-10-14 23:47:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:44,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:49,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:49,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 23:47:49,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:47:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 23:47:49,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:49,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:47:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 23:47:49,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:47:49,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:49,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:49,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:49,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:49,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 3972 proven. 45 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2020-10-14 23:47:49,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565832952] [2020-10-14 23:47:49,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:49,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:47:49,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797615650] [2020-10-14 23:47:49,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:47:49,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:47:49,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:47:49,510 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 12 states. [2020-10-14 23:47:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:49,599 INFO L93 Difference]: Finished difference Result 306 states and 341 transitions. [2020-10-14 23:47:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:47:49,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 154 [2020-10-14 23:47:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:49,602 INFO L225 Difference]: With dead ends: 306 [2020-10-14 23:47:49,602 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 23:47:49,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:47:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 23:47:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-14 23:47:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 23:47:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2020-10-14 23:47:49,615 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 154 [2020-10-14 23:47:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:49,615 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2020-10-14 23:47:49,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:47:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2020-10-14 23:47:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 23:47:49,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:49,617 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:49,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:47:49,618 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1125925135, now seen corresponding path program 10 times [2020-10-14 23:47:49,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:49,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720814741] [2020-10-14 23:47:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:49,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:50,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:51,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:51,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 23:47:51,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:51,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1999 [2020-10-14 23:47:51,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:51,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:47:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-14 23:47:51,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:51,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:51,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:51,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:51,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:51,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:51,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:51,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-14 23:47:52,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720814741] [2020-10-14 23:47:52,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:52,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:47:52,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667632691] [2020-10-14 23:47:52,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:47:52,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:47:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:47:52,071 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 15 states. [2020-10-14 23:47:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:52,294 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2020-10-14 23:47:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:47:52,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 166 [2020-10-14 23:47:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:52,296 INFO L225 Difference]: With dead ends: 197 [2020-10-14 23:47:52,296 INFO L226 Difference]: Without dead ends: 192 [2020-10-14 23:47:52,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:47:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-14 23:47:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2020-10-14 23:47:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-14 23:47:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2020-10-14 23:47:52,312 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 166 [2020-10-14 23:47:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:52,313 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2020-10-14 23:47:52,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:47:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2020-10-14 23:47:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-14 23:47:52,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:52,316 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:52,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:47:52,316 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1024998408, now seen corresponding path program 11 times [2020-10-14 23:47:52,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:52,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937779793] [2020-10-14 23:47:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:54,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:54,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-14 23:47:54,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:54,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2187 [2020-10-14 23:47:54,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:54,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:47:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:54,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-14 23:47:54,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:54,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:54,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:54,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:54,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:54,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:54,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:54,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:54,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:54,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:54,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:54,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:54,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-14 23:47:54,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937779793] [2020-10-14 23:47:54,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:54,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:47:54,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140270663] [2020-10-14 23:47:54,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:47:54,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:47:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:47:54,870 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand 16 states. [2020-10-14 23:47:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:55,141 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-10-14 23:47:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:47:55,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 179 [2020-10-14 23:47:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:55,143 INFO L225 Difference]: With dead ends: 210 [2020-10-14 23:47:55,143 INFO L226 Difference]: Without dead ends: 205 [2020-10-14 23:47:55,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:47:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-14 23:47:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2020-10-14 23:47:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 23:47:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 207 transitions. [2020-10-14 23:47:55,162 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 207 transitions. Word has length 179 [2020-10-14 23:47:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:55,163 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 207 transitions. [2020-10-14 23:47:55,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:47:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 207 transitions. [2020-10-14 23:47:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-14 23:47:55,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:55,166 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:55,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:47:55,167 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash 627335761, now seen corresponding path program 12 times [2020-10-14 23:47:55,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:55,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968039239] [2020-10-14 23:47:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:55,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:56,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3822 [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:59,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:47:59,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:47:59,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-14 23:47:59,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:59,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:59,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:59,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:47:59,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:59,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:47:59,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:59,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:59,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:59,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-14 23:47:59,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968039239] [2020-10-14 23:47:59,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:59,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:47:59,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960624324] [2020-10-14 23:47:59,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:47:59,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:59,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:47:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:47:59,566 INFO L87 Difference]: Start difference. First operand 193 states and 207 transitions. Second operand 17 states. [2020-10-14 23:47:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:59,966 INFO L93 Difference]: Finished difference Result 223 states and 239 transitions. [2020-10-14 23:47:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:47:59,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 192 [2020-10-14 23:47:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:59,969 INFO L225 Difference]: With dead ends: 223 [2020-10-14 23:47:59,969 INFO L226 Difference]: Without dead ends: 218 [2020-10-14 23:47:59,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:47:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-14 23:47:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2020-10-14 23:47:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-14 23:47:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2020-10-14 23:47:59,994 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 192 [2020-10-14 23:47:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:59,995 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2020-10-14 23:47:59,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:47:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2020-10-14 23:48:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-14 23:48:00,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:00,000 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:00,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:48:00,001 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash 351509656, now seen corresponding path program 13 times [2020-10-14 23:48:00,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:00,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662182574] [2020-10-14 23:48:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:02,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2032 [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:48:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:02,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-14 23:48:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:02,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:02,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:02,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:02,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:02,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:02,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:02,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:02,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-14 23:48:02,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662182574] [2020-10-14 23:48:02,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:02,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:48:02,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99666356] [2020-10-14 23:48:02,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:48:02,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:02,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:48:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:48:02,651 INFO L87 Difference]: Start difference. First operand 206 states and 221 transitions. Second operand 18 states. [2020-10-14 23:48:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:02,964 INFO L93 Difference]: Finished difference Result 236 states and 253 transitions. [2020-10-14 23:48:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:48:02,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 205 [2020-10-14 23:48:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:02,967 INFO L225 Difference]: With dead ends: 236 [2020-10-14 23:48:02,967 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 23:48:02,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:48:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 23:48:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 219. [2020-10-14 23:48:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 23:48:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 235 transitions. [2020-10-14 23:48:02,985 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 235 transitions. Word has length 205 [2020-10-14 23:48:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:02,985 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 235 transitions. [2020-10-14 23:48:02,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:48:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 235 transitions. [2020-10-14 23:48:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-14 23:48:02,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:02,988 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:02,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:48:02,989 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 167087537, now seen corresponding path program 14 times [2020-10-14 23:48:02,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:02,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476245523] [2020-10-14 23:48:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:03,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:07,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:07,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-14 23:48:07,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:07,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4261 [2020-10-14 23:48:07,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:07,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:07,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:48:07,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:07,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-14 23:48:07,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:07,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:07,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:07,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:07,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:07,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:07,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:07,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:07,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-14 23:48:07,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476245523] [2020-10-14 23:48:07,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:07,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:48:07,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189474038] [2020-10-14 23:48:07,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:48:07,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:48:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:48:07,719 INFO L87 Difference]: Start difference. First operand 219 states and 235 transitions. Second operand 19 states. [2020-10-14 23:48:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:08,083 INFO L93 Difference]: Finished difference Result 249 states and 267 transitions. [2020-10-14 23:48:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:48:08,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 218 [2020-10-14 23:48:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:08,089 INFO L225 Difference]: With dead ends: 249 [2020-10-14 23:48:08,090 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 23:48:08,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:48:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 23:48:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2020-10-14 23:48:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-14 23:48:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 249 transitions. [2020-10-14 23:48:08,115 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 249 transitions. Word has length 218 [2020-10-14 23:48:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:08,116 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 249 transitions. [2020-10-14 23:48:08,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:48:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 249 transitions. [2020-10-14 23:48:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-14 23:48:08,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:08,118 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:08,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:48:08,118 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -670307016, now seen corresponding path program 15 times [2020-10-14 23:48:08,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:08,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916870865] [2020-10-14 23:48:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:08,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:10,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:10,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-14 23:48:10,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:10,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-14 23:48:10,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:10,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:48:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-14 23:48:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:11,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:11,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:11,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:11,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:11,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:11,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:11,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:11,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:11,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-14 23:48:11,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916870865] [2020-10-14 23:48:11,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:11,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:48:11,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66306375] [2020-10-14 23:48:11,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:48:11,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:48:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:48:11,285 INFO L87 Difference]: Start difference. First operand 232 states and 249 transitions. Second operand 20 states. [2020-10-14 23:48:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:11,699 INFO L93 Difference]: Finished difference Result 262 states and 281 transitions. [2020-10-14 23:48:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:48:11,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 231 [2020-10-14 23:48:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:11,701 INFO L225 Difference]: With dead ends: 262 [2020-10-14 23:48:11,701 INFO L226 Difference]: Without dead ends: 257 [2020-10-14 23:48:11,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:48:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-14 23:48:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2020-10-14 23:48:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-14 23:48:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 263 transitions. [2020-10-14 23:48:11,722 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 263 transitions. Word has length 231 [2020-10-14 23:48:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:11,722 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 263 transitions. [2020-10-14 23:48:11,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:48:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 263 transitions. [2020-10-14 23:48:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-14 23:48:11,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:11,724 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:11,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:48:11,725 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2021834479, now seen corresponding path program 16 times [2020-10-14 23:48:11,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:11,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524629069] [2020-10-14 23:48:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:16,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-14 23:48:16,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:17,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:17,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:17,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:17,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:17,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:17,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:17,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-14 23:48:17,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524629069] [2020-10-14 23:48:17,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:17,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:48:17,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859163581] [2020-10-14 23:48:17,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:48:17,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:17,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:48:17,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:48:17,362 INFO L87 Difference]: Start difference. First operand 245 states and 263 transitions. Second operand 21 states. [2020-10-14 23:48:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:17,835 INFO L93 Difference]: Finished difference Result 275 states and 295 transitions. [2020-10-14 23:48:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:48:17,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 244 [2020-10-14 23:48:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:17,838 INFO L225 Difference]: With dead ends: 275 [2020-10-14 23:48:17,839 INFO L226 Difference]: Without dead ends: 270 [2020-10-14 23:48:17,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:48:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-14 23:48:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2020-10-14 23:48:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-14 23:48:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 277 transitions. [2020-10-14 23:48:17,864 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 277 transitions. Word has length 244 [2020-10-14 23:48:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:17,864 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 277 transitions. [2020-10-14 23:48:17,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:48:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 277 transitions. [2020-10-14 23:48:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-14 23:48:17,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:17,866 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:17,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:48:17,866 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:17,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1794460200, now seen corresponding path program 17 times [2020-10-14 23:48:17,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:17,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797207487] [2020-10-14 23:48:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3456 [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:48:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:21,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-14 23:48:21,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:21,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:21,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:21,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:21,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:21,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:21,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:21,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:21,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:21,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-14 23:48:21,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797207487] [2020-10-14 23:48:21,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:21,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:48:21,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155358392] [2020-10-14 23:48:21,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:48:21,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:21,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:48:21,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:48:21,937 INFO L87 Difference]: Start difference. First operand 258 states and 277 transitions. Second operand 22 states. [2020-10-14 23:48:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:22,473 INFO L93 Difference]: Finished difference Result 288 states and 309 transitions. [2020-10-14 23:48:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:48:22,474 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 257 [2020-10-14 23:48:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:22,477 INFO L225 Difference]: With dead ends: 288 [2020-10-14 23:48:22,477 INFO L226 Difference]: Without dead ends: 283 [2020-10-14 23:48:22,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:48:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-14 23:48:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2020-10-14 23:48:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 23:48:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 291 transitions. [2020-10-14 23:48:22,502 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 291 transitions. Word has length 257 [2020-10-14 23:48:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:22,502 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 291 transitions. [2020-10-14 23:48:22,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:48:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 291 transitions. [2020-10-14 23:48:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-14 23:48:22,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:22,504 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:22,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:48:22,505 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash -949912463, now seen corresponding path program 18 times [2020-10-14 23:48:22,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:22,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859796969] [2020-10-14 23:48:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:27,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:27,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-14 23:48:27,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:27,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-14 23:48:27,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:27,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:27,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:48:27,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:27,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-14 23:48:27,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:28,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:28,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:28,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:28,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:28,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:28,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:28,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-14 23:48:28,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859796969] [2020-10-14 23:48:28,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:28,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:48:28,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288635065] [2020-10-14 23:48:28,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:48:28,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:48:28,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:48:28,237 INFO L87 Difference]: Start difference. First operand 271 states and 291 transitions. Second operand 23 states. [2020-10-14 23:48:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:28,816 INFO L93 Difference]: Finished difference Result 301 states and 323 transitions. [2020-10-14 23:48:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:48:28,817 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 270 [2020-10-14 23:48:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:28,819 INFO L225 Difference]: With dead ends: 301 [2020-10-14 23:48:28,819 INFO L226 Difference]: Without dead ends: 296 [2020-10-14 23:48:28,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:48:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-14 23:48:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2020-10-14 23:48:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-14 23:48:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 305 transitions. [2020-10-14 23:48:28,841 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 305 transitions. Word has length 270 [2020-10-14 23:48:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:28,842 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 305 transitions. [2020-10-14 23:48:28,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:48:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 305 transitions. [2020-10-14 23:48:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-14 23:48:28,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:28,844 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:28,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:48:28,844 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash 407500408, now seen corresponding path program 19 times [2020-10-14 23:48:28,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:28,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664342960] [2020-10-14 23:48:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:29,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:33,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:33,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-14 23:48:33,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:33,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4389 [2020-10-14 23:48:33,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:33,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:33,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:48:33,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:33,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-14 23:48:33,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:33,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:33,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:33,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:33,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:33,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:33,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:33,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:33,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:33,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-14 23:48:33,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664342960] [2020-10-14 23:48:33,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:33,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:48:33,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783669924] [2020-10-14 23:48:33,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:48:33,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:48:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:48:33,917 INFO L87 Difference]: Start difference. First operand 284 states and 305 transitions. Second operand 24 states. [2020-10-14 23:48:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:34,560 INFO L93 Difference]: Finished difference Result 314 states and 337 transitions. [2020-10-14 23:48:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:48:34,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 283 [2020-10-14 23:48:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:34,563 INFO L225 Difference]: With dead ends: 314 [2020-10-14 23:48:34,563 INFO L226 Difference]: Without dead ends: 309 [2020-10-14 23:48:34,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:48:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-14 23:48:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 297. [2020-10-14 23:48:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-14 23:48:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 319 transitions. [2020-10-14 23:48:34,583 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 319 transitions. Word has length 283 [2020-10-14 23:48:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:34,583 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 319 transitions. [2020-10-14 23:48:34,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:48:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 319 transitions. [2020-10-14 23:48:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-14 23:48:34,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:34,585 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:34,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:48:34,585 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:34,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1602764753, now seen corresponding path program 20 times [2020-10-14 23:48:34,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:34,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334020824] [2020-10-14 23:48:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:34,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:37,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:39,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:39,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-14 23:48:39,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:39,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 23:48:39,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:39,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:48:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-14 23:48:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:40,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:40,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:40,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:40,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:40,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:40,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:40,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:40,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-14 23:48:40,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334020824] [2020-10-14 23:48:40,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:40,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:48:40,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943251906] [2020-10-14 23:48:40,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:48:40,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:48:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:48:40,329 INFO L87 Difference]: Start difference. First operand 297 states and 319 transitions. Second operand 25 states. [2020-10-14 23:48:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:41,010 INFO L93 Difference]: Finished difference Result 327 states and 351 transitions. [2020-10-14 23:48:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:48:41,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 296 [2020-10-14 23:48:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:41,013 INFO L225 Difference]: With dead ends: 327 [2020-10-14 23:48:41,014 INFO L226 Difference]: Without dead ends: 322 [2020-10-14 23:48:41,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:48:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-14 23:48:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 310. [2020-10-14 23:48:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-14 23:48:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 333 transitions. [2020-10-14 23:48:41,040 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 333 transitions. Word has length 296 [2020-10-14 23:48:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:41,041 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 333 transitions. [2020-10-14 23:48:41,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:48:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 333 transitions. [2020-10-14 23:48:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-14 23:48:41,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:41,043 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:41,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:48:41,044 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 295939864, now seen corresponding path program 21 times [2020-10-14 23:48:41,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:41,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659334658] [2020-10-14 23:48:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:41,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:46,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:46,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-14 23:48:46,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-14 23:48:46,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:46,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:48:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:46,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-14 23:48:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:46,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:46,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:46,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:46,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:46,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:46,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:46,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:46,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-14 23:48:46,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659334658] [2020-10-14 23:48:46,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:46,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:48:46,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137843608] [2020-10-14 23:48:46,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:48:46,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:48:46,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:48:46,904 INFO L87 Difference]: Start difference. First operand 310 states and 333 transitions. Second operand 26 states. [2020-10-14 23:48:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:47,652 INFO L93 Difference]: Finished difference Result 340 states and 365 transitions. [2020-10-14 23:48:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:48:47,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 309 [2020-10-14 23:48:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:47,657 INFO L225 Difference]: With dead ends: 340 [2020-10-14 23:48:47,657 INFO L226 Difference]: Without dead ends: 335 [2020-10-14 23:48:47,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:48:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-14 23:48:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2020-10-14 23:48:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-14 23:48:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 347 transitions. [2020-10-14 23:48:47,682 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 347 transitions. Word has length 309 [2020-10-14 23:48:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:47,683 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 347 transitions. [2020-10-14 23:48:47,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:48:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 347 transitions. [2020-10-14 23:48:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-14 23:48:47,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:47,686 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:47,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:48:47,686 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:47,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:47,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1302885583, now seen corresponding path program 22 times [2020-10-14 23:48:47,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:47,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621789428] [2020-10-14 23:48:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:48:52,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:52,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-14 23:48:52,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:53,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:53,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:53,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:53,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:53,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:48:53,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:53,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:53,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-14 23:48:53,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621789428] [2020-10-14 23:48:53,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:53,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:48:53,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402977377] [2020-10-14 23:48:53,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:48:53,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:53,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:48:53,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:48:53,651 INFO L87 Difference]: Start difference. First operand 323 states and 347 transitions. Second operand 27 states. [2020-10-14 23:48:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:54,431 INFO L93 Difference]: Finished difference Result 353 states and 379 transitions. [2020-10-14 23:48:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:48:54,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 322 [2020-10-14 23:48:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:54,433 INFO L225 Difference]: With dead ends: 353 [2020-10-14 23:48:54,434 INFO L226 Difference]: Without dead ends: 348 [2020-10-14 23:48:54,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:48:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-14 23:48:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 336. [2020-10-14 23:48:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-14 23:48:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 361 transitions. [2020-10-14 23:48:54,463 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 361 transitions. Word has length 322 [2020-10-14 23:48:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:54,464 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 361 transitions. [2020-10-14 23:48:54,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:48:54,464 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 361 transitions. [2020-10-14 23:48:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-14 23:48:54,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:54,466 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:54,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:48:54,467 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:54,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:54,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1267605576, now seen corresponding path program 23 times [2020-10-14 23:48:54,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:54,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716415024] [2020-10-14 23:48:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:59,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:59,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-14 23:48:59,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-14 23:48:59,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:59,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:48:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-14 23:48:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:00,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:00,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:00,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:00,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:00,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:00,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:00,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:00,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:00,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:00,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-14 23:49:00,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716415024] [2020-10-14 23:49:00,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:00,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:49:00,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753965045] [2020-10-14 23:49:00,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:49:00,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:49:00,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:49:00,459 INFO L87 Difference]: Start difference. First operand 336 states and 361 transitions. Second operand 28 states. [2020-10-14 23:49:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:01,320 INFO L93 Difference]: Finished difference Result 366 states and 393 transitions. [2020-10-14 23:49:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:49:01,321 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 335 [2020-10-14 23:49:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:01,323 INFO L225 Difference]: With dead ends: 366 [2020-10-14 23:49:01,323 INFO L226 Difference]: Without dead ends: 361 [2020-10-14 23:49:01,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:49:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-14 23:49:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 349. [2020-10-14 23:49:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-14 23:49:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 375 transitions. [2020-10-14 23:49:01,355 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 375 transitions. Word has length 335 [2020-10-14 23:49:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:01,355 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 375 transitions. [2020-10-14 23:49:01,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:49:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 375 transitions. [2020-10-14 23:49:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-10-14 23:49:01,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:01,358 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:01,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:49:01,358 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:01,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1320509073, now seen corresponding path program 24 times [2020-10-14 23:49:01,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:01,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988904715] [2020-10-14 23:49:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:01,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:06,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-14 23:49:06,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:07,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:07,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:07,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:07,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:07,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:07,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-14 23:49:07,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988904715] [2020-10-14 23:49:07,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:07,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:49:07,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846208559] [2020-10-14 23:49:07,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:49:07,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:49:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:49:07,467 INFO L87 Difference]: Start difference. First operand 349 states and 375 transitions. Second operand 29 states. [2020-10-14 23:49:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:08,382 INFO L93 Difference]: Finished difference Result 379 states and 407 transitions. [2020-10-14 23:49:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:49:08,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 348 [2020-10-14 23:49:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:08,384 INFO L225 Difference]: With dead ends: 379 [2020-10-14 23:49:08,384 INFO L226 Difference]: Without dead ends: 374 [2020-10-14 23:49:08,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:49:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-14 23:49:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 362. [2020-10-14 23:49:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-14 23:49:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 389 transitions. [2020-10-14 23:49:08,424 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 389 transitions. Word has length 348 [2020-10-14 23:49:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:08,425 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 389 transitions. [2020-10-14 23:49:08,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:49:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 389 transitions. [2020-10-14 23:49:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-14 23:49:08,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:08,427 INFO L422 BasicCegarLoop]: trace histogram [270, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:08,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:49:08,428 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1468958808, now seen corresponding path program 25 times [2020-10-14 23:49:08,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:08,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717920933] [2020-10-14 23:49:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:08,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:13,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:13,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-14 23:49:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:14,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:14,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:14,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:14,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-10-14 23:49:14,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717920933] [2020-10-14 23:49:14,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:14,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:49:14,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391276795] [2020-10-14 23:49:14,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:49:14,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:49:14,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:49:14,512 INFO L87 Difference]: Start difference. First operand 362 states and 389 transitions. Second operand 30 states. [2020-10-14 23:49:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:15,488 INFO L93 Difference]: Finished difference Result 392 states and 421 transitions. [2020-10-14 23:49:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:49:15,488 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 361 [2020-10-14 23:49:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:15,490 INFO L225 Difference]: With dead ends: 392 [2020-10-14 23:49:15,490 INFO L226 Difference]: Without dead ends: 387 [2020-10-14 23:49:15,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:49:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-14 23:49:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 375. [2020-10-14 23:49:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-14 23:49:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 403 transitions. [2020-10-14 23:49:15,526 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 403 transitions. Word has length 361 [2020-10-14 23:49:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:15,526 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 403 transitions. [2020-10-14 23:49:15,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:49:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 403 transitions. [2020-10-14 23:49:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-14 23:49:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:15,529 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:15,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:49:15,529 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1342683633, now seen corresponding path program 26 times [2020-10-14 23:49:15,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:15,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776628450] [2020-10-14 23:49:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:15,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:20,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-14 23:49:20,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 366 [2020-10-14 23:49:20,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:21,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:21,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:21,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:21,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:21,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:21,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:21,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-10-14 23:49:21,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776628450] [2020-10-14 23:49:21,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:21,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:49:21,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51144820] [2020-10-14 23:49:21,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:49:21,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:49:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:49:21,734 INFO L87 Difference]: Start difference. First operand 375 states and 403 transitions. Second operand 31 states. [2020-10-14 23:49:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:22,746 INFO L93 Difference]: Finished difference Result 405 states and 435 transitions. [2020-10-14 23:49:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:49:22,747 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 374 [2020-10-14 23:49:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:22,749 INFO L225 Difference]: With dead ends: 405 [2020-10-14 23:49:22,749 INFO L226 Difference]: Without dead ends: 400 [2020-10-14 23:49:22,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:49:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-14 23:49:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 388. [2020-10-14 23:49:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-14 23:49:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 417 transitions. [2020-10-14 23:49:22,782 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 417 transitions. Word has length 374 [2020-10-14 23:49:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:22,783 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 417 transitions. [2020-10-14 23:49:22,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:49:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 417 transitions. [2020-10-14 23:49:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-14 23:49:22,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:22,785 INFO L422 BasicCegarLoop]: trace histogram [290, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:22,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:49:22,786 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:22,786 INFO L82 PathProgramCache]: Analyzing trace with hash 357804280, now seen corresponding path program 27 times [2020-10-14 23:49:22,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:22,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710961116] [2020-10-14 23:49:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:23,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:28,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 395 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 379 [2020-10-14 23:49:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:28,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:28,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:28,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:28,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:28,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:28,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:28,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:28,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:28,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:28,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:28,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2020-10-14 23:49:29,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710961116] [2020-10-14 23:49:29,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:29,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:49:29,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043349394] [2020-10-14 23:49:29,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:49:29,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:49:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:49:29,050 INFO L87 Difference]: Start difference. First operand 388 states and 417 transitions. Second operand 32 states. [2020-10-14 23:49:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:30,145 INFO L93 Difference]: Finished difference Result 418 states and 449 transitions. [2020-10-14 23:49:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:49:30,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 387 [2020-10-14 23:49:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:30,148 INFO L225 Difference]: With dead ends: 418 [2020-10-14 23:49:30,148 INFO L226 Difference]: Without dead ends: 413 [2020-10-14 23:49:30,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:49:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-14 23:49:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 401. [2020-10-14 23:49:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-14 23:49:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 431 transitions. [2020-10-14 23:49:30,189 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 431 transitions. Word has length 387 [2020-10-14 23:49:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:30,189 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 431 transitions. [2020-10-14 23:49:30,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:49:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 431 transitions. [2020-10-14 23:49:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-10-14 23:49:30,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:30,192 INFO L422 BasicCegarLoop]: trace histogram [300, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:30,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:49:30,192 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1103848111, now seen corresponding path program 28 times [2020-10-14 23:49:30,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:30,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188044786] [2020-10-14 23:49:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:35,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:35,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-14 23:49:35,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:35,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 23:49:35,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:35,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:49:35,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:35,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 392 [2020-10-14 23:49:35,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:36,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:36,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:36,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:36,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:36,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:36,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:36,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:36,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:36,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:36,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-14 23:49:36,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188044786] [2020-10-14 23:49:36,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:36,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:49:36,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553965894] [2020-10-14 23:49:36,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:49:36,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:49:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:49:36,387 INFO L87 Difference]: Start difference. First operand 401 states and 431 transitions. Second operand 33 states. [2020-10-14 23:49:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:37,623 INFO L93 Difference]: Finished difference Result 431 states and 463 transitions. [2020-10-14 23:49:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:49:37,624 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 400 [2020-10-14 23:49:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:37,626 INFO L225 Difference]: With dead ends: 431 [2020-10-14 23:49:37,626 INFO L226 Difference]: Without dead ends: 426 [2020-10-14 23:49:37,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:49:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-14 23:49:37,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 414. [2020-10-14 23:49:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-14 23:49:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 445 transitions. [2020-10-14 23:49:37,671 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 445 transitions. Word has length 400 [2020-10-14 23:49:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:37,672 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 445 transitions. [2020-10-14 23:49:37,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:49:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 445 transitions. [2020-10-14 23:49:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-14 23:49:37,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:37,675 INFO L422 BasicCegarLoop]: trace histogram [310, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:37,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:49:37,675 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:37,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1805336984, now seen corresponding path program 29 times [2020-10-14 23:49:37,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:37,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206155843] [2020-10-14 23:49:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:38,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:42,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 23:49:42,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:42,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 405 [2020-10-14 23:49:42,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:43,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:43,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:43,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:43,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:43,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:43,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 58931 backedges. 0 proven. 57226 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2020-10-14 23:49:44,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206155843] [2020-10-14 23:49:44,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:44,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 23:49:44,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386688602] [2020-10-14 23:49:44,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 23:49:44,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 23:49:44,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:49:44,037 INFO L87 Difference]: Start difference. First operand 414 states and 445 transitions. Second operand 34 states. [2020-10-14 23:49:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:45,325 INFO L93 Difference]: Finished difference Result 444 states and 477 transitions. [2020-10-14 23:49:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:49:45,326 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 413 [2020-10-14 23:49:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:45,328 INFO L225 Difference]: With dead ends: 444 [2020-10-14 23:49:45,328 INFO L226 Difference]: Without dead ends: 439 [2020-10-14 23:49:45,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:49:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-14 23:49:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 427. [2020-10-14 23:49:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-14 23:49:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 459 transitions. [2020-10-14 23:49:45,374 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 459 transitions. Word has length 413 [2020-10-14 23:49:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:45,374 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 459 transitions. [2020-10-14 23:49:45,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 23:49:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 459 transitions. [2020-10-14 23:49:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-14 23:49:45,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:45,378 INFO L422 BasicCegarLoop]: trace histogram [320, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:45,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:49:45,378 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -308148047, now seen corresponding path program 30 times [2020-10-14 23:49:45,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:45,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977370817] [2020-10-14 23:49:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:45,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:50,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 418 [2020-10-14 23:49:50,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:51,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:51,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:51,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:51,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:51,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:49:51,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:51,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:51,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:51,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2020-10-14 23:49:51,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977370817] [2020-10-14 23:49:51,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:51,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:49:51,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033367464] [2020-10-14 23:49:51,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:49:51,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:49:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:49:51,716 INFO L87 Difference]: Start difference. First operand 427 states and 459 transitions. Second operand 35 states. [2020-10-14 23:49:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:49:53,057 INFO L93 Difference]: Finished difference Result 457 states and 491 transitions. [2020-10-14 23:49:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:49:53,058 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 426 [2020-10-14 23:49:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:49:53,060 INFO L225 Difference]: With dead ends: 457 [2020-10-14 23:49:53,060 INFO L226 Difference]: Without dead ends: 452 [2020-10-14 23:49:53,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:49:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-14 23:49:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 440. [2020-10-14 23:49:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-14 23:49:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 473 transitions. [2020-10-14 23:49:53,108 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 473 transitions. Word has length 426 [2020-10-14 23:49:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:49:53,109 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 473 transitions. [2020-10-14 23:49:53,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:49:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 473 transitions. [2020-10-14 23:49:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-10-14 23:49:53,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:49:53,112 INFO L422 BasicCegarLoop]: trace histogram [330, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:49:53,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:49:53,112 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:49:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:49:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash -608218568, now seen corresponding path program 31 times [2020-10-14 23:49:53,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:49:53,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277825762] [2020-10-14 23:49:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:49:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:58,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:58,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 447 [2020-10-14 23:49:58,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:58,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5285 [2020-10-14 23:49:58,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:58,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 23:49:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:49:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 431 [2020-10-14 23:49:58,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:49:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:49:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:49:59,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:49:59,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:49:59,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:49:59,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:49:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:49:59,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:49:59,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:49:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:49:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:49:59,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:49:59,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:49:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 66792 backedges. 0 proven. 64977 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2020-10-14 23:49:59,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277825762] [2020-10-14 23:49:59,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:49:59,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 23:49:59,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775228433] [2020-10-14 23:49:59,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 23:49:59,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:49:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 23:49:59,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:49:59,799 INFO L87 Difference]: Start difference. First operand 440 states and 473 transitions. Second operand 36 states. [2020-10-14 23:50:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:01,273 INFO L93 Difference]: Finished difference Result 470 states and 505 transitions. [2020-10-14 23:50:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:50:01,274 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 439 [2020-10-14 23:50:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:01,275 INFO L225 Difference]: With dead ends: 470 [2020-10-14 23:50:01,275 INFO L226 Difference]: Without dead ends: 465 [2020-10-14 23:50:01,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:50:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-14 23:50:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 453. [2020-10-14 23:50:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-14 23:50:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 487 transitions. [2020-10-14 23:50:01,317 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 487 transitions. Word has length 439 [2020-10-14 23:50:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:01,317 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 487 transitions. [2020-10-14 23:50:01,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 23:50:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 487 transitions. [2020-10-14 23:50:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-14 23:50:01,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:01,321 INFO L422 BasicCegarLoop]: trace histogram [340, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:01,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:50:01,321 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash -550110191, now seen corresponding path program 32 times [2020-10-14 23:50:01,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:01,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157521745] [2020-10-14 23:50:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:06,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:06,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-10-14 23:50:06,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:06,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-14 23:50:06,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:06,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:50:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:06,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 444 [2020-10-14 23:50:06,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:07,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:07,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:07,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:07,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:07,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:07,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:07,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 70907 backedges. 0 proven. 69037 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2020-10-14 23:50:07,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157521745] [2020-10-14 23:50:07,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:07,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:50:07,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091668393] [2020-10-14 23:50:07,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:50:07,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:50:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:50:07,925 INFO L87 Difference]: Start difference. First operand 453 states and 487 transitions. Second operand 37 states. [2020-10-14 23:50:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:09,449 INFO L93 Difference]: Finished difference Result 483 states and 519 transitions. [2020-10-14 23:50:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:50:09,450 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 452 [2020-10-14 23:50:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:09,452 INFO L225 Difference]: With dead ends: 483 [2020-10-14 23:50:09,452 INFO L226 Difference]: Without dead ends: 478 [2020-10-14 23:50:09,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:50:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-14 23:50:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 466. [2020-10-14 23:50:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-14 23:50:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 501 transitions. [2020-10-14 23:50:09,510 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 501 transitions. Word has length 452 [2020-10-14 23:50:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:09,511 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 501 transitions. [2020-10-14 23:50:09,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:50:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 501 transitions. [2020-10-14 23:50:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-10-14 23:50:09,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:09,514 INFO L422 BasicCegarLoop]: trace histogram [350, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:09,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:50:09,514 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1969628456, now seen corresponding path program 33 times [2020-10-14 23:50:09,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:09,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844036053] [2020-10-14 23:50:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:09,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:14,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5158 [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 23:50:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:50:14,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 457 [2020-10-14 23:50:14,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:50:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:50:15,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:50:15,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:50:15,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:50:15,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:50:15,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:50:15,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:50:15,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:50:15,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:50:15,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:50:15,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:50:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 75145 backedges. 0 proven. 73220 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2020-10-14 23:50:16,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844036053] [2020-10-14 23:50:16,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:50:16,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 23:50:16,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222526228] [2020-10-14 23:50:16,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 23:50:16,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:50:16,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 23:50:16,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:50:16,220 INFO L87 Difference]: Start difference. First operand 466 states and 501 transitions. Second operand 38 states. [2020-10-14 23:50:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:50:17,880 INFO L93 Difference]: Finished difference Result 496 states and 533 transitions. [2020-10-14 23:50:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:50:17,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 465 [2020-10-14 23:50:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:50:17,882 INFO L225 Difference]: With dead ends: 496 [2020-10-14 23:50:17,882 INFO L226 Difference]: Without dead ends: 491 [2020-10-14 23:50:17,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:50:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-14 23:50:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 479. [2020-10-14 23:50:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-14 23:50:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 515 transitions. [2020-10-14 23:50:17,925 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 515 transitions. Word has length 465 [2020-10-14 23:50:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:50:17,925 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 515 transitions. [2020-10-14 23:50:17,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 23:50:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 515 transitions. [2020-10-14 23:50:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-14 23:50:17,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:50:17,928 INFO L422 BasicCegarLoop]: trace histogram [360, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:50:17,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:50:17,929 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:50:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:50:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1604946063, now seen corresponding path program 34 times [2020-10-14 23:50:17,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:50:17,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149589962] [2020-10-14 23:50:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:50:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:50:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking...