/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:15:38,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:15:38,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:15:38,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:15:38,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:15:38,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:15:38,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:15:38,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:15:38,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:15:38,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:15:38,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:15:38,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:15:38,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:15:38,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:15:38,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:15:38,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:15:38,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:15:38,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:15:38,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:15:38,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:15:38,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:15:38,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:15:38,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:15:38,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:15:38,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:15:38,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:15:38,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:15:38,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:15:38,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:15:38,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:15:38,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:15:38,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:15:38,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:15:39,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:15:39,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:15:39,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:15:39,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:15:39,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:15:39,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:15:39,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:15:39,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:15:39,004 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 05:15:39,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:15:39,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:15:39,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:15:39,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:15:39,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:15:39,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:15:39,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:15:39,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:15:39,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:15:39,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:15:39,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:15:39,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:15:39,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:15:39,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:15:39,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:15:39,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:15:39,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:15:39,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:15:39,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:15:39,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:15:39,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:15:39,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:15:39,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:15:39,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:15:39,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:15:39,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:15:39,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:15:39,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:15:39,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:15:39,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:15:39,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:15:39,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:15:39,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:15:39,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:15:39,339 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:15:39,339 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2020-10-14 05:15:39,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2144b06b/d46852c238ab4420aa941eb807c4dc68/FLAGc816f96b3 [2020-10-14 05:15:39,847 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:15:39,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2020-10-14 05:15:39,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2144b06b/d46852c238ab4420aa941eb807c4dc68/FLAGc816f96b3 [2020-10-14 05:15:40,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2144b06b/d46852c238ab4420aa941eb807c4dc68 [2020-10-14 05:15:40,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:15:40,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:15:40,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:15:40,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:15:40,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:15:40,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dadf5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40, skipping insertion in model container [2020-10-14 05:15:40,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:15:40,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:15:40,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:15:40,478 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:15:40,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:15:40,505 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:15:40,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40 WrapperNode [2020-10-14 05:15:40,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:15:40,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:15:40,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:15:40,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:15:40,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (1/1) ... [2020-10-14 05:15:40,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:15:40,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:15:40,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:15:40,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:15:40,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (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 05:15:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:15:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:15:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:15:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:15:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:15:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:15:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:15:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:15:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:15:40,868 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:15:40,868 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:15:40,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:15:40 BoogieIcfgContainer [2020-10-14 05:15:40,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:15:40,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:15:40,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:15:40,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:15:40,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:15:40" (1/3) ... [2020-10-14 05:15:40,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d30f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:15:40, skipping insertion in model container [2020-10-14 05:15:40,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:40" (2/3) ... [2020-10-14 05:15:40,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d30f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:15:40, skipping insertion in model container [2020-10-14 05:15:40,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:15:40" (3/3) ... [2020-10-14 05:15:40,880 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2020-10-14 05:15:40,891 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:15:40,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:15:40,909 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:15:40,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:15:40,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:15:40,931 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:15:40,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:15:40,931 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:15:40,931 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:15:40,932 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:15:40,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:15:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 05:15:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:15:40,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:40,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:40,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 05:15:40,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:40,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633291232] [2020-10-14 05:15:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:15:41,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:41,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-14 05:15:41,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:41,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:15:41,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:41,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:41,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:15:41,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:41,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:41,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:41,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:41,345 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 05:15:41,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633291232] [2020-10-14 05:15:41,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:41,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:15:41,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604059689] [2020-10-14 05:15:41,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:15:41,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:15:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:15:41,376 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-14 05:15:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:41,400 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 05:15:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:15:41,401 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:15:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:41,407 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:15:41,408 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:15:41,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:15:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:15:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:15:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:15:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 05:15:41,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 05:15:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:41,444 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 05:15:41,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:15:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 05:15:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:15:41,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:41,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:41,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:15:41,446 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-14 05:15:41,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:41,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273340455] [2020-10-14 05:15:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:15:41,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:41,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-14 05:15:41,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:15:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:15:41,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:15:41,822 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-10-14 05:15:41,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:41,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:41,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:15:41,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:41,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:41,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:41,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:41,833 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 05:15:41,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273340455] [2020-10-14 05:15:41,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:41,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:15:41,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408270548] [2020-10-14 05:15:41,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:15:41,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:15:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:41,838 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 05:15:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:41,861 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-14 05:15:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:15:41,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:15:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:41,863 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:15:41,863 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:15:41,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:15:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:15:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:15:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:15:41,869 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:15:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:41,869 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:15:41,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:15:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:15:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:15:41,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:41,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:41,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:15:41,871 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 05:15:41,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:41,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851094052] [2020-10-14 05:15:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:15:41,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:41,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-14 05:15:41,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:15:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:15:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:15:41,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:41,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:41,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:41,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:41,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:41,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:15:41,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:41,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:42,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:42,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:42,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:42,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851094052] [2020-10-14 05:15:42,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:42,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:15:42,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357773643] [2020-10-14 05:15:42,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:15:42,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:42,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:15:42,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:42,009 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 05:15:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:42,033 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 05:15:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:15:42,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:15:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:42,035 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:15:42,035 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:15:42,036 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 05:15:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:15:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:15:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:15:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:15:42,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 05:15:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:42,041 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:15:42,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:15:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:15:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:15:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:42,043 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:42,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:15:42,044 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:42,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-14 05:15:42,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:42,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410805732] [2020-10-14 05:15:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:15:42,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-14 05:15:42,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:15:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:15:42,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:42,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:42,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:42,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:42,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:42,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:15:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:42,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410805732] [2020-10-14 05:15:42,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:42,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:15:42,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51385751] [2020-10-14 05:15:42,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:15:42,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:42,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:15:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:15:42,234 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:15:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:42,276 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:15:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:15:42,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:15:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:42,278 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:15:42,278 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:15:42,279 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 05:15:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:15:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:15:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:15:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:15:42,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-14 05:15:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:42,297 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:15:42,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:15:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:15:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:15:42,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:42,298 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:42,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:15:42,298 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash -582276883, now seen corresponding path program 2 times [2020-10-14 05:15:42,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:42,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651167050] [2020-10-14 05:15:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:15:42,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:42,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-14 05:15:42,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:15:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:15:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:42,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:42,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:42,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:42,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:42,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:42,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:42,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:42,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651167050] [2020-10-14 05:15:42,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:42,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:15:42,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616899783] [2020-10-14 05:15:42,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:15:42,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:15:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:42,564 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:15:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:42,595 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:15:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:15:42,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:15:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:42,597 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:15:42,597 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:15:42,598 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 05:15:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:15:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:15:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:15:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:15:42,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-14 05:15:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:42,605 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:15:42,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:15:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:15:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:15:42,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:42,606 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:42,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:15:42,606 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash 719600874, now seen corresponding path program 3 times [2020-10-14 05:15:42,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:42,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455825143] [2020-10-14 05:15:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:15:42,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:42,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 05:15:42,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:15:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:15:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:15:42,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:42,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:42,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:42,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:42,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:42,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:15:42,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455825143] [2020-10-14 05:15:42,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:42,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:15:42,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795650285] [2020-10-14 05:15:42,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:15:42,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:15:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:15:42,813 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-14 05:15:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:42,846 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:15:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:15:42,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 05:15:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:42,849 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:15:42,849 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:15:42,850 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 05:15:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:15:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:15:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:15:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 05:15:42,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 05:15:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:42,857 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 05:15:42,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:15:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 05:15:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:15:42,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:42,859 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:42,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:15:42,859 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:42,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1179295589, now seen corresponding path program 4 times [2020-10-14 05:15:42,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:42,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378194342] [2020-10-14 05:15:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:42,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:15:43,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:43,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-14 05:15:43,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:15:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:43,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:15:43,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:43,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:43,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:43,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:43,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:43,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:43,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:15:43,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378194342] [2020-10-14 05:15:43,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:43,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:15:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636861496] [2020-10-14 05:15:43,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:15:43,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:15:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:43,190 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 05:15:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:43,232 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:15:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:15:43,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:15:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:43,233 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:15:43,234 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:15:43,234 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 05:15:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:15:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:15:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:15:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:15:43,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 05:15:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:43,241 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:15:43,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:15:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:15:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:15:43,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:43,242 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:43,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:15:43,242 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash 957312226, now seen corresponding path program 5 times [2020-10-14 05:15:43,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:43,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222083596] [2020-10-14 05:15:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:15:43,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:43,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-14 05:15:43,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:15:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:15:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:15:43,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:43,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:43,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:43,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:43,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:43,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:43,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:15:43,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222083596] [2020-10-14 05:15:43,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:43,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:15:43,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897773243] [2020-10-14 05:15:43,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:15:43,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:15:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:43,529 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-14 05:15:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:43,632 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:15:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:15:43,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:15:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:43,634 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:15:43,634 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:15:43,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:15:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-14 05:15:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:15:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:15:43,641 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2020-10-14 05:15:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:43,641 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:15:43,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:15:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:15:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:15:43,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:43,643 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:43,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:15:43,643 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:43,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1986638173, now seen corresponding path program 6 times [2020-10-14 05:15:43,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:43,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747358347] [2020-10-14 05:15:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:43,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:43,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:44,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:15:44,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:44,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-14 05:15:44,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:44,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:15:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:44,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:15:44,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:44,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:44,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:44,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:44,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:44,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:44,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:44,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:44,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:44,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:15:44,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747358347] [2020-10-14 05:15:44,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:44,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:15:44,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233799000] [2020-10-14 05:15:44,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:15:44,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:44,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:15:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:15:44,252 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-14 05:15:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:44,315 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:15:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:15:44,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:15:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:44,317 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:15:44,317 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:15:44,317 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 05:15:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:15:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:15:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:15:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:15:44,331 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-10-14 05:15:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:44,331 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:15:44,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:15:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:15:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:15:44,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:44,332 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:44,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:15:44,333 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1226737574, now seen corresponding path program 7 times [2020-10-14 05:15:44,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:44,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840027370] [2020-10-14 05:15:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:44,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:44,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:15:44,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-14 05:15:44,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:44,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:15:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:44,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:15:44,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:44,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:44,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:44,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:44,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:44,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:44,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:44,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:15:44,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840027370] [2020-10-14 05:15:44,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:44,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:15:44,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826621644] [2020-10-14 05:15:44,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:15:44,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:15:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:44,885 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2020-10-14 05:15:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:44,956 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-14 05:15:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:15:44,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:15:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:44,957 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:15:44,957 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:15:44,958 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 05:15:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:15:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 05:15:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:15:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 05:15:44,964 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-14 05:15:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:44,964 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 05:15:44,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:15:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 05:15:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:15:44,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:44,965 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:44,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:15:44,966 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1199344617, now seen corresponding path program 8 times [2020-10-14 05:15:44,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:44,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414117903] [2020-10-14 05:15:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:44,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:45,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:45,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:45,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:15:45,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:45,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 05:15:45,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:45,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:45,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:15:45,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:15:45,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:15:45,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:45,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:45,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:45,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:45,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:45,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:45,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:45,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:45,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:45,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:15:45,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414117903] [2020-10-14 05:15:45,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:45,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:15:45,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093152593] [2020-10-14 05:15:45,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:15:45,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:15:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:45,389 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-14 05:15:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:45,832 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-14 05:15:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:15:45,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 05:15:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:45,833 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:15:45,834 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:15:45,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:15:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 05:15:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:15:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:15:45,840 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-14 05:15:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:45,840 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:15:45,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:15:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:15:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:15:45,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:45,842 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:45,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:15:45,842 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash -386351278, now seen corresponding path program 9 times [2020-10-14 05:15:45,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:45,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727759291] [2020-10-14 05:15:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:45,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:46,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:46,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:15:46,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:46,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-14 05:15:46,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:46,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:15:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:46,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:15:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:46,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:46,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:46,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:46,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:46,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:46,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:46,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:46,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:46,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:15:46,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727759291] [2020-10-14 05:15:46,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:46,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:15:46,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503319238] [2020-10-14 05:15:46,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:15:46,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:15:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:15:46,640 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-14 05:15:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:46,738 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-14 05:15:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:15:46,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 05:15:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:46,739 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:15:46,739 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:15:46,740 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 05:15:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:15:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:15:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:15:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 05:15:46,746 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2020-10-14 05:15:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:46,746 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 05:15:46,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:15:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 05:15:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:15:46,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:46,747 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:46,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:15:46,748 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:46,748 INFO L82 PathProgramCache]: Analyzing trace with hash 227316879, now seen corresponding path program 10 times [2020-10-14 05:15:46,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:46,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114399431] [2020-10-14 05:15:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:47,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:47,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:15:47,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-14 05:15:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:47,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:15:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:15:47,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:15:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:47,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:47,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:47,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:47,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:47,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:47,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-14 05:15:47,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114399431] [2020-10-14 05:15:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:15:47,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476658737] [2020-10-14 05:15:47,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:15:47,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:15:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:15:47,531 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-10-14 05:15:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:49,556 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-14 05:15:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:15:49,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-14 05:15:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:49,558 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:15:49,558 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:15:49,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:15:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:15:49,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-14 05:15:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:15:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 05:15:49,565 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-14 05:15:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:49,565 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 05:15:49,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:15:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 05:15:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:15:49,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:49,566 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:49,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:15:49,567 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash 540778954, now seen corresponding path program 11 times [2020-10-14 05:15:49,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:49,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662638041] [2020-10-14 05:15:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:49,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:50,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:50,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:15:50,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:50,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-14 05:15:50,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:50,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:50,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:15:50,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:50,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:15:50,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:50,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:50,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:50,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:50,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:50,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:15:50,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:50,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:50,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:15:50,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662638041] [2020-10-14 05:15:50,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:50,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:15:50,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526257601] [2020-10-14 05:15:50,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:15:50,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:50,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:15:50,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:15:50,531 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 10 states. [2020-10-14 05:15:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:50,635 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-14 05:15:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:15:50,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 05:15:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:50,637 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:15:50,637 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:15:50,638 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 05:15:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:15:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:15:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:15:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:15:50,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2020-10-14 05:15:50,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:50,648 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:15:50,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:15:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:15:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:15:50,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:50,651 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:50,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:15:50,651 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2143776633, now seen corresponding path program 12 times [2020-10-14 05:15:50,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:50,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505525184] [2020-10-14 05:15:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:50,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:51,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:51,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:15:51,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:51,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-14 05:15:51,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:51,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:15:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:15:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:15:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:51,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:51,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:51,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:51,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:51,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:51,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:51,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:15:51,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505525184] [2020-10-14 05:15:51,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:51,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:15:51,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854064655] [2020-10-14 05:15:51,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:15:51,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:15:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:51,957 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-14 05:15:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:57,874 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-14 05:15:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:15:57,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 05:15:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:57,883 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:15:57,883 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:15:57,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:15:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:15:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-14 05:15:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:15:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 05:15:57,890 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-14 05:15:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:57,891 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 05:15:57,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:15:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 05:15:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:15:57,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:57,892 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:57,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:15:57,892 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1747419198, now seen corresponding path program 13 times [2020-10-14 05:15:57,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:57,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919370612] [2020-10-14 05:15:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:59,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:59,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:15:59,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:59,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1356 [2020-10-14 05:15:59,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:59,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:59,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:15:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:15:59,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:59,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:59,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:15:59,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919370612] [2020-10-14 05:15:59,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:59,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:15:59,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567616670] [2020-10-14 05:15:59,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:15:59,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:15:59,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:15:59,422 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-14 05:15:59,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:59,556 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-14 05:15:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:15:59,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-14 05:15:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:59,558 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:15:59,558 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:15:59,558 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 05:15:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:15:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:15:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:15:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 05:15:59,570 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2020-10-14 05:15:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:59,570 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 05:15:59,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:15:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 05:15:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:15:59,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:59,574 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:59,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:15:59,574 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:59,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1105868801, now seen corresponding path program 14 times [2020-10-14 05:15:59,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:59,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985151136] [2020-10-14 05:15:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:59,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:01,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:01,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:16:01,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:01,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-14 05:16:01,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:01,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:16:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:16:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:01,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:01,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:01,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:01,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:01,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:16:01,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985151136] [2020-10-14 05:16:01,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:01,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:16:01,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400833855] [2020-10-14 05:16:01,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:16:01,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:16:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:16:01,298 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2020-10-14 05:16:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:01,471 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 05:16:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:16:01,472 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 05:16:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:01,473 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:16:01,473 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:16:01,473 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 05:16:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:16:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 05:16:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:16:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-14 05:16:01,482 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 40 [2020-10-14 05:16:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:01,483 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-14 05:16:01,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:16:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-14 05:16:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:16:01,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:01,485 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:01,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:16:01,486 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1243739388, now seen corresponding path program 15 times [2020-10-14 05:16:01,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:01,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210416272] [2020-10-14 05:16:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:01,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:02,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:02,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:16:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:02,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1270 [2020-10-14 05:16:02,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:02,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:02,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:16:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 05:16:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:16:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:02,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:02,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:02,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:02,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:02,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:16:02,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:02,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:02,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:02,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:02,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:02,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 130 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 05:16:02,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210416272] [2020-10-14 05:16:02,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:02,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:16:02,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732754487] [2020-10-14 05:16:02,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:16:02,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:16:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:16:02,964 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 9 states. [2020-10-14 05:16:05,708 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2020-10-14 05:16:07,962 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-14 05:16:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:13,180 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-14 05:16:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:16:13,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 05:16:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:13,184 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:16:13,184 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:16:13,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:16:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:16:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-14 05:16:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:16:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-14 05:16:13,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 42 [2020-10-14 05:16:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:13,199 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-14 05:16:13,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:16:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-14 05:16:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:16:13,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:13,200 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:13,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:16:13,201 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:13,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1929733385, now seen corresponding path program 16 times [2020-10-14 05:16:13,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:13,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063266245] [2020-10-14 05:16:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:13,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:15,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:15,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:16:15,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:15,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-14 05:16:15,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:15,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:15,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:16:15,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:15,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:16:15,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:15,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:15,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:15,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:15,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:15,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:16:15,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:15,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:15,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:16:15,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063266245] [2020-10-14 05:16:15,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:15,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:16:15,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416029299] [2020-10-14 05:16:15,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:16:15,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:16:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:16:15,253 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 13 states. [2020-10-14 05:16:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:15,471 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-14 05:16:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:16:15,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-14 05:16:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:15,475 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:16:15,475 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:16:15,476 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 05:16:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:16:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 05:16:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:16:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-14 05:16:15,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 44 [2020-10-14 05:16:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:15,492 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-14 05:16:15,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:16:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-14 05:16:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:16:15,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:15,493 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:15,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:16:15,494 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:15,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1392639628, now seen corresponding path program 17 times [2020-10-14 05:16:15,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:15,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054003623] [2020-10-14 05:16:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:17,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:17,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:16:17,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:17,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1647 [2020-10-14 05:16:17,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:17,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:17,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:16:17,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:16:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:16:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:19,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:19,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:19,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:19,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 165 proven. 47 refuted. 2 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 05:16:19,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054003623] [2020-10-14 05:16:19,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:19,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:16:19,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249931149] [2020-10-14 05:16:19,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:16:19,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:16:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2020-10-14 05:16:19,397 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-14 05:16:21,767 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:16:22,258 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:16:24,803 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-10-14 05:16:31,522 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2020-10-14 05:16:37,177 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 17 [2020-10-14 05:16:45,278 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:16:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:45,368 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-10-14 05:16:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:16:45,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-14 05:16:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:45,370 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:16:45,370 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:16:45,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=94, Invalid=176, Unknown=2, NotChecked=0, Total=272 [2020-10-14 05:16:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:16:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-14 05:16:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:16:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-14 05:16:45,379 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2020-10-14 05:16:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:45,380 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-14 05:16:45,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:16:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-14 05:16:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:16:45,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:45,381 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:45,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:16:45,381 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1459263121, now seen corresponding path program 18 times [2020-10-14 05:16:45,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:45,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369508533] [2020-10-14 05:16:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:45,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:45,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:47,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:47,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:16:47,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:47,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1683 [2020-10-14 05:16:47,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:47,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:47,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:16:47,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:47,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:16:47,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:47,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:47,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:47,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:47,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:47,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:47,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:16:47,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369508533] [2020-10-14 05:16:47,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:47,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:16:47,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875162629] [2020-10-14 05:16:47,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:16:47,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:16:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:16:47,408 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-10-14 05:16:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:47,644 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-14 05:16:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:16:47,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-14 05:16:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:47,645 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:16:47,645 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:16:47,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:16:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:16:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 05:16:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:16:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-14 05:16:47,655 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2020-10-14 05:16:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:47,656 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-14 05:16:47,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:16:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-14 05:16:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:16:47,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:47,657 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:47,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:16:47,657 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:47,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1278785172, now seen corresponding path program 19 times [2020-10-14 05:16:47,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:47,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618302509] [2020-10-14 05:16:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:47,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:47,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:49,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:49,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:16:49,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:49,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1578 [2020-10-14 05:16:49,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:49,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:16:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:16:49,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:49,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:49,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:49,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:49,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:49,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:49,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:49,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:49,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 195 proven. 156 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:16:49,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618302509] [2020-10-14 05:16:49,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:49,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:16:49,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940736995] [2020-10-14 05:16:49,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:16:49,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:49,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:16:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:16:49,492 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 15 states. [2020-10-14 05:16:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:49,801 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-10-14 05:16:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:16:49,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 05:16:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:49,803 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:16:49,804 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:16:49,804 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 05:16:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:16:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 05:16:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:16:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-14 05:16:49,821 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 50 [2020-10-14 05:16:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:49,822 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-14 05:16:49,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:16:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-14 05:16:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:16:49,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:49,824 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:49,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:16:49,824 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 361831977, now seen corresponding path program 20 times [2020-10-14 05:16:49,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:49,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917100030] [2020-10-14 05:16:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:49,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:51,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:16:51,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 05:16:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:16:51,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:57,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:57,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:57,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 221 proven. 58 refuted. 6 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-14 05:16:57,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917100030] [2020-10-14 05:16:57,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:57,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:16:57,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585499373] [2020-10-14 05:16:57,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:16:57,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:16:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=80, Unknown=3, NotChecked=0, Total=110 [2020-10-14 05:16:57,881 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2020-10-14 05:16:58,639 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:16:59,385 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-14 05:17:00,869 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:17:12,627 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:17:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:15,413 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-14 05:17:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:17:15,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-14 05:17:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:15,414 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:17:15,414 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:17:15,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=115, Invalid=224, Unknown=3, NotChecked=0, Total=342 [2020-10-14 05:17:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:17:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-10-14 05:17:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:17:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 05:17:15,424 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 52 [2020-10-14 05:17:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 05:17:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:17:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 05:17:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:17:15,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:15,426 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:15,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:17:15,426 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:15,426 INFO L82 PathProgramCache]: Analyzing trace with hash 960769252, now seen corresponding path program 21 times [2020-10-14 05:17:15,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:15,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478123986] [2020-10-14 05:17:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:15,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:15,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:17,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:17,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:17:17,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:17,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1932 [2020-10-14 05:17:17,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:17,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:17:17,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:17:17,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:17:17,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:17,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:17,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:17,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:17,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:17:17,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:17,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:17,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:17,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:17:17,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478123986] [2020-10-14 05:17:17,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:17,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:17:17,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503645623] [2020-10-14 05:17:17,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:17:17,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:17:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:17:17,631 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 16 states. [2020-10-14 05:17:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:17,962 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-10-14 05:17:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:17:17,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-14 05:17:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:17,963 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:17:17,963 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:17:17,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:17:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:17:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:17:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:17:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 05:17:17,978 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2020-10-14 05:17:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:17,978 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 05:17:17,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:17:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 05:17:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:17:17,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:17,979 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:17,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:17:17,980 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1147886369, now seen corresponding path program 22 times [2020-10-14 05:17:17,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:17,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380460987] [2020-10-14 05:17:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:17,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:20,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:20,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:17:20,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2340 [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:17:20,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:47,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:47,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:47,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:47,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:47,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:47,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 75 refuted. 6 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-14 05:17:47,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380460987] [2020-10-14 05:17:47,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:47,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:17:47,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033649208] [2020-10-14 05:17:47,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:17:47,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:17:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=94, Unknown=9, NotChecked=0, Total=132 [2020-10-14 05:17:47,186 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2020-10-14 05:18:00,135 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-10-14 05:18:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:30,938 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-10-14 05:18:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:18:30,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-14 05:18:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:30,939 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:18:30,939 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:18:30,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=33, Invalid=114, Unknown=9, NotChecked=0, Total=156 [2020-10-14 05:18:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:18:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 05:18:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:18:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-14 05:18:30,949 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 56 [2020-10-14 05:18:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:30,949 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-14 05:18:30,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:18:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-14 05:18:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:18:30,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:30,950 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:30,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:18:30,951 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash 444795868, now seen corresponding path program 23 times [2020-10-14 05:18:30,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:30,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746973734] [2020-10-14 05:18:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:31,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:33,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:33,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:18:33,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:33,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2498 [2020-10-14 05:18:33,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:33,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:18:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:18:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:18:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:33,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:33,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:33,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:18:33,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:18:33,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:33,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:33,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 05:18:33,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746973734] [2020-10-14 05:18:33,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:33,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:18:33,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072169079] [2020-10-14 05:18:33,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:18:33,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:33,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:18:33,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:18:33,776 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 17 states. [2020-10-14 05:18:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:34,156 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-14 05:18:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:18:34,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-14 05:18:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:34,157 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:18:34,157 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:18:34,158 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 05:18:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:18:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 05:18:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:18:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-14 05:18:34,166 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-10-14 05:18:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:34,167 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-14 05:18:34,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:18:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-14 05:18:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:18:34,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:34,167 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:34,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:18:34,168 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash -977349735, now seen corresponding path program 24 times [2020-10-14 05:18:34,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:34,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750514224] [2020-10-14 05:18:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:37,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:37,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:18:37,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3311 [2020-10-14 05:18:37,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:37,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:37,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:18:37,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 05:18:37,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:18:37,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:37,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:37,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:37,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:37,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:18:37,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:37,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:18:37,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:37,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:37,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:37,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:37,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:37,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-14 05:18:37,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750514224] [2020-10-14 05:18:37,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:37,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:18:37,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901365456] [2020-10-14 05:18:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:18:37,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:18:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:18:37,828 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 13 states. [2020-10-14 05:18:42,441 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-14 05:18:47,208 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-14 05:18:53,045 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2020-10-14 05:18:59,313 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 19 [2020-10-14 05:19:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:03,775 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-14 05:19:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:19:03,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-14 05:19:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:03,777 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:19:03,777 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:19:03,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=163, Invalid=340, Unknown=3, NotChecked=0, Total=506 [2020-10-14 05:19:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:19:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-10-14 05:19:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:19:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-14 05:19:03,787 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 60 [2020-10-14 05:19:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:03,787 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-14 05:19:03,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:19:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-14 05:19:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:19:03,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:03,788 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:03,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:19:03,789 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1797634476, now seen corresponding path program 25 times [2020-10-14 05:19:03,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:03,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598661540] [2020-10-14 05:19:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:03,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:05,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:05,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:19:05,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:05,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2094 [2020-10-14 05:19:05,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:05,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:05,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:19:05,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:19:05,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:19:05,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:06,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:06,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:06,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:06,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:06,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:06,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:19:06,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:06,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:06,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:06,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:19:06,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598661540] [2020-10-14 05:19:06,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:19:06,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:19:06,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276414990] [2020-10-14 05:19:06,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:19:06,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:19:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:19:06,266 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 18 states. [2020-10-14 05:19:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:06,684 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-14 05:19:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:19:06,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-14 05:19:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:06,689 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:19:06,689 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:19:06,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:19:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:19:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:19:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:19:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-14 05:19:06,701 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 62 [2020-10-14 05:19:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:06,701 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-14 05:19:06,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:19:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-14 05:19:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:19:06,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:06,702 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:06,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:19:06,703 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash 692184977, now seen corresponding path program 26 times [2020-10-14 05:19:06,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:06,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285358308] [2020-10-14 05:19:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:06,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:07,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2411 [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:09,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:19:09,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:19:09,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:19:09,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:09,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:09,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:09,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:09,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:09,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:09,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:09,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:09,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:19:09,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285358308] [2020-10-14 05:19:09,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:19:09,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:19:09,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469473194] [2020-10-14 05:19:09,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:19:09,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:09,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:19:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:19:09,477 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 19 states. [2020-10-14 05:19:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:09,918 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2020-10-14 05:19:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:19:09,919 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-14 05:19:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:09,920 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:19:09,920 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:19:09,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:19:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:19:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:19:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:19:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-14 05:19:09,935 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 64 [2020-10-14 05:19:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:09,935 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-14 05:19:09,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:19:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-14 05:19:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:19:09,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:09,936 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:09,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:19:09,936 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1111895438, now seen corresponding path program 27 times [2020-10-14 05:19:09,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:09,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852522948] [2020-10-14 05:19:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:09,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:10,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2791 [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:19:12,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 05:19:12,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:19:12,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:23,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:23,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:23,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:23,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 391 proven. 111 refuted. 10 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-14 05:19:23,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852522948] [2020-10-14 05:19:23,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:19:23,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:19:23,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958077672] [2020-10-14 05:19:23,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:19:23,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:19:23,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=141, Unknown=5, NotChecked=0, Total=182 [2020-10-14 05:19:23,514 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 14 states. [2020-10-14 05:19:26,363 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17 [2020-10-14 05:19:27,715 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2020-10-14 05:19:31,597 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-10-14 05:19:36,316 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 17 [2020-10-14 05:19:37,008 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2020-10-14 05:19:53,868 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 17