/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 SingleStatement --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:41:47,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:41:47,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:41:48,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:41:48,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:41:48,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:41:48,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:41:48,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:41:48,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:41:48,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:41:48,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:41:48,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:41:48,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:41:48,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:41:48,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:41:48,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:41:48,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:41:48,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:41:48,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:41:48,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:41:48,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:41:48,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:41:48,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:41:48,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:41:48,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:41:48,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:41:48,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:41:48,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:41:48,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:41:48,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:41:48,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:41:48,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:41:48,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:41:48,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:41:48,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:41:48,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:41:48,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:41:48,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:41:48,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:41:48,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:41:48,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:41:48,078 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 [2020-09-24 20:41:48,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:41:48,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:41:48,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:41:48,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:41:48,126 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:41:48,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:41:48,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:41:48,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:41:48,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:41:48,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:41:48,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:41:48,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:41:48,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:41:48,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:41:48,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:41:48,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:41:48,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:41:48,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:41:48,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:41:48,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:41:48,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:41:48,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:48,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:41:48,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:41:48,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:41:48,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:41:48,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:41:48,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:41:48,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:41:48,133 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 -> SingleStatement 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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=true; [2020-09-24 20:41:48,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:41:48,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:41:48,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:41:48,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:41:48,694 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:41:48,696 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-09-24 20:41:48,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee5d17eac/ed5fac93e78f42dea6e589a3d27d0c55/FLAGc687fa2ac [2020-09-24 20:41:49,345 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:41:49,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-09-24 20:41:49,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee5d17eac/ed5fac93e78f42dea6e589a3d27d0c55/FLAGc687fa2ac [2020-09-24 20:41:49,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee5d17eac/ed5fac93e78f42dea6e589a3d27d0c55 [2020-09-24 20:41:49,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:41:49,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:41:49,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:49,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:41:49,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:41:49,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:49" (1/1) ... [2020-09-24 20:41:49,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45241865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:49, skipping insertion in model container [2020-09-24 20:41:49,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:49" (1/1) ... [2020-09-24 20:41:49,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:41:49,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:41:50,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:50,028 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:41:50,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:50,202 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:41:50,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50 WrapperNode [2020-09-24 20:41:50,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:50,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:41:50,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:41:50,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:41:50,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (1/1) ... [2020-09-24 20:41:50,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:41:50,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:41:50,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:41:50,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:41:50,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (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 [2020-09-24 20:41:50,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:41:50,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:41:50,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:41:50,351 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-09-24 20:41:50,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:41:50,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-09-24 20:41:50,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:41:50,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:41:50,352 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-09-24 20:41:50,352 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-09-24 20:41:50,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:41:50,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 20:41:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 20:41:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:41:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:41:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:41:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:41:50,997 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:41:50,997 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-24 20:41:51,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:51 BoogieIcfgContainer [2020-09-24 20:41:51,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:41:51,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:41:51,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:41:51,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:41:51,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:41:49" (1/3) ... [2020-09-24 20:41:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ffd21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:51, skipping insertion in model container [2020-09-24 20:41:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:50" (2/3) ... [2020-09-24 20:41:51,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ffd21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:51, skipping insertion in model container [2020-09-24 20:41:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:51" (3/3) ... [2020-09-24 20:41:51,015 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-09-24 20:41:51,028 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:41:51,040 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:41:51,065 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:41:51,101 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:41:51,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:41:51,102 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:41:51,102 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:41:51,102 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:41:51,102 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:41:51,103 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:41:51,103 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:41:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-09-24 20:41:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 20:41:51,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:51,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:51,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1445504148, now seen corresponding path program 1 times [2020-09-24 20:41:51,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:51,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080926697] [2020-09-24 20:41:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:51,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:51,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:52,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:52,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 20:41:52,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:41:52,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-09-24 20:41:52,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:41:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:41:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:41:52,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:41:52,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:52,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:52,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:52,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:41:52,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 20:41:52,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:52,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:52,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:52,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:52,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080926697] [2020-09-24 20:41:52,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:41:52,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 20:41:52,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686707648] [2020-09-24 20:41:52,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:41:52,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:52,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:41:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:41:52,702 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 8 states. [2020-09-24 20:41:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:53,642 INFO L93 Difference]: Finished difference Result 377 states and 446 transitions. [2020-09-24 20:41:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:41:53,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-24 20:41:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:53,659 INFO L225 Difference]: With dead ends: 377 [2020-09-24 20:41:53,659 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 20:41:53,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:41:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 20:41:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-09-24 20:41:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 20:41:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-09-24 20:41:53,738 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 30 [2020-09-24 20:41:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:53,739 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-09-24 20:41:53,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:41:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-09-24 20:41:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 20:41:53,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:53,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:53,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:41:53,743 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash -905808642, now seen corresponding path program 1 times [2020-09-24 20:41:53,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:53,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695069253] [2020-09-24 20:41:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:53,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:54,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:54,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:54,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 20:41:54,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:41:54,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1215 [2020-09-24 20:41:54,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:54,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:41:54,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:41:54,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:41:54,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:55,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:55,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:55,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:41:55,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:55,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:41:55,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:55,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695069253] [2020-09-24 20:41:55,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:55,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:41:55,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125128323] [2020-09-24 20:41:55,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:41:55,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:41:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:41:55,139 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 10 states. [2020-09-24 20:41:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:55,808 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-09-24 20:41:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 20:41:55,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-24 20:41:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:55,812 INFO L225 Difference]: With dead ends: 108 [2020-09-24 20:41:55,812 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 20:41:55,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:41:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 20:41:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2020-09-24 20:41:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 20:41:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-09-24 20:41:55,828 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 39 [2020-09-24 20:41:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:55,829 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-09-24 20:41:55,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:41:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-09-24 20:41:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 20:41:55,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:55,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:55,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:41:55,833 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1206774819, now seen corresponding path program 1 times [2020-09-24 20:41:55,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:55,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692981202] [2020-09-24 20:41:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 20:42:00,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 20:42:00,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 20:42:00,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:42:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 20:42:00,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 20:42:00,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:01,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:01,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:42:01,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:01,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:01,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:01,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:01,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 20:42:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:01,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:42:01,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:01,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:42:01,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692981202] [2020-09-24 20:42:01,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:01,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:42:01,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405491164] [2020-09-24 20:42:01,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:42:01,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:01,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:42:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:42:01,088 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 12 states. [2020-09-24 20:42:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:01,878 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2020-09-24 20:42:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 20:42:01,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-09-24 20:42:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:01,886 INFO L225 Difference]: With dead ends: 155 [2020-09-24 20:42:01,886 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 20:42:01,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-09-24 20:42:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 20:42:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 90. [2020-09-24 20:42:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 20:42:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-09-24 20:42:01,913 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 61 [2020-09-24 20:42:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:01,915 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-09-24 20:42:01,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:42:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-09-24 20:42:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 20:42:01,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:01,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:01,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:42:01,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1161712723, now seen corresponding path program 2 times [2020-09-24 20:42:01,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:01,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143283878] [2020-09-24 20:42:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:06,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:06,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:06,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:06,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 20:42:06,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 20:42:06,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 20:42:06,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:06,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:42:06,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:42:06,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 20:42:06,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:07,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:07,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:07,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:07,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 20:42:07,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:07,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:07,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 20:42:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:07,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:07,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:07,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:07,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:07,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:42:07,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:07,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:07,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 20:42:07,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143283878] [2020-09-24 20:42:07,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:07,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:42:07,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160065032] [2020-09-24 20:42:07,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:42:07,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:42:07,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:42:07,136 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 10 states. [2020-09-24 20:42:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:07,743 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2020-09-24 20:42:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 20:42:07,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-09-24 20:42:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:07,746 INFO L225 Difference]: With dead ends: 171 [2020-09-24 20:42:07,746 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 20:42:07,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-09-24 20:42:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 20:42:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2020-09-24 20:42:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 20:42:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2020-09-24 20:42:07,762 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 70 [2020-09-24 20:42:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:07,762 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2020-09-24 20:42:07,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:42:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2020-09-24 20:42:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 20:42:07,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:07,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:07,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:42:07,766 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash -344437953, now seen corresponding path program 3 times [2020-09-24 20:42:07,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:07,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636706148] [2020-09-24 20:42:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:08,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:08,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:11,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:12,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:12,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 20:42:12,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 20:42:12,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 20:42:12,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:12,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:42:12,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 20:42:12,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 20:42:12,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:12,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:12,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:12,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:12,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:12,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:12,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 20:42:12,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:12,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:12,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:12,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-24 20:42:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:12,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:12,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:12,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:12,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:12,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:42:12,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:12,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:12,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:12,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:12,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:12,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636706148] [2020-09-24 20:42:12,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:12,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:42:12,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912274626] [2020-09-24 20:42:12,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:42:12,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:12,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:42:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:42:12,972 INFO L87 Difference]: Start difference. First operand 138 states and 156 transitions. Second operand 12 states. [2020-09-24 20:42:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:13,526 INFO L93 Difference]: Finished difference Result 302 states and 345 transitions. [2020-09-24 20:42:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:42:13,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-24 20:42:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:13,528 INFO L225 Difference]: With dead ends: 302 [2020-09-24 20:42:13,528 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 20:42:13,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-09-24 20:42:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 20:42:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2020-09-24 20:42:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 20:42:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-09-24 20:42:13,550 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 79 [2020-09-24 20:42:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:13,550 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-09-24 20:42:13,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:42:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-09-24 20:42:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 20:42:13,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:13,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:13,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:42:13,554 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:13,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash 380047341, now seen corresponding path program 4 times [2020-09-24 20:42:13,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:13,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468125642] [2020-09-24 20:42:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:13,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:13,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:13,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:16,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:16,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:16,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:18,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:18,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:18,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:18,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 20:42:18,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 20:42:18,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 20:42:18,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:42:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:42:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-24 20:42:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:18,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:18,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:18,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:18,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:18,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:18,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 20:42:18,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:18,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 20:42:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:18,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:18,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:18,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:18,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:18,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:42:18,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:18,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:18,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:18,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:18,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 3 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 20:42:18,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468125642] [2020-09-24 20:42:18,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:18,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:42:18,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532577975] [2020-09-24 20:42:18,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:42:18,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:42:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:42:18,874 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 16 states. [2020-09-24 20:42:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:19,985 INFO L93 Difference]: Finished difference Result 212 states and 233 transitions. [2020-09-24 20:42:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 20:42:19,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2020-09-24 20:42:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:19,989 INFO L225 Difference]: With dead ends: 212 [2020-09-24 20:42:19,989 INFO L226 Difference]: Without dead ends: 210 [2020-09-24 20:42:19,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1582, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 20:42:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-24 20:42:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2020-09-24 20:42:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-24 20:42:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-09-24 20:42:20,001 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 88 [2020-09-24 20:42:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:20,002 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-09-24 20:42:20,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:42:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-09-24 20:42:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 20:42:20,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:20,003 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:20,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:42:20,003 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash 312426909, now seen corresponding path program 5 times [2020-09-24 20:42:20,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:20,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757528902] [2020-09-24 20:42:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:20,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:20,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:20,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:20,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:22,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:22,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:25,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 20:42:25,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:42:25,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 20:42:25,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:25,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:42:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 20:42:25,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 20:42:25,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:25,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:25,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:25,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:25,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:42:25,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:25,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:25,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 20:42:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:25,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:25,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:25,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:42:25,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:25,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 83 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:25,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757528902] [2020-09-24 20:42:25,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:25,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:42:25,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569443282] [2020-09-24 20:42:25,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:42:25,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:25,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:42:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:42:25,270 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 16 states. [2020-09-24 20:42:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:25,867 INFO L93 Difference]: Finished difference Result 276 states and 304 transitions. [2020-09-24 20:42:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 20:42:25,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-09-24 20:42:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:25,869 INFO L225 Difference]: With dead ends: 276 [2020-09-24 20:42:25,869 INFO L226 Difference]: Without dead ends: 137 [2020-09-24 20:42:25,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-09-24 20:42:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-24 20:42:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2020-09-24 20:42:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 20:42:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-09-24 20:42:25,879 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 97 [2020-09-24 20:42:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:25,880 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-09-24 20:42:25,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:42:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-09-24 20:42:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 20:42:25,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:25,881 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:25,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:42:25,882 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:25,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1257469643, now seen corresponding path program 6 times [2020-09-24 20:42:25,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:25,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941313260] [2020-09-24 20:42:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:25,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:26,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:28,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:29,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:30,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:30,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-24 20:42:30,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:42:30,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 20:42:30,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:30,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:42:30,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 20:42:30,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 20:42:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:31,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:31,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:31,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:31,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:42:31,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:31,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 20:42:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:31,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:31,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:31,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:31,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:42:31,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:31,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:31,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:31,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 100 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:31,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941313260] [2020-09-24 20:42:31,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:31,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 20:42:31,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251061324] [2020-09-24 20:42:31,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 20:42:31,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 20:42:31,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:42:31,240 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 18 states. [2020-09-24 20:42:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:32,141 INFO L93 Difference]: Finished difference Result 334 states and 365 transitions. [2020-09-24 20:42:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 20:42:32,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 106 [2020-09-24 20:42:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:32,144 INFO L225 Difference]: With dead ends: 334 [2020-09-24 20:42:32,145 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 20:42:32,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 20:42:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 20:42:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 139. [2020-09-24 20:42:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-24 20:42:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2020-09-24 20:42:32,173 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 106 [2020-09-24 20:42:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:32,174 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2020-09-24 20:42:32,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 20:42:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2020-09-24 20:42:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 20:42:32,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:32,175 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:32,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:42:32,176 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1253913949, now seen corresponding path program 7 times [2020-09-24 20:42:32,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:32,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106484257] [2020-09-24 20:42:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:34,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:34,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:35,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:36,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:37,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:37,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 20:42:37,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 20:42:37,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 20:42:37,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:42:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 20:42:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-24 20:42:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:37,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:37,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:37,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:37,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:42:37,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:37,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:42:37,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:37,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 20:42:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:37,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:37,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:42:37,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:42:37,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:37,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:42:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:42:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 3 proven. 214 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-09-24 20:42:37,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106484257] [2020-09-24 20:42:37,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:37,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 20:42:37,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393721987] [2020-09-24 20:42:37,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 20:42:37,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 20:42:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:42:37,474 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand 18 states. [2020-09-24 20:42:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:39,340 INFO L93 Difference]: Finished difference Result 237 states and 258 transitions. [2020-09-24 20:42:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-24 20:42:39,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2020-09-24 20:42:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:39,343 INFO L225 Difference]: With dead ends: 237 [2020-09-24 20:42:39,344 INFO L226 Difference]: Without dead ends: 235 [2020-09-24 20:42:39,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=885, Invalid=3275, Unknown=0, NotChecked=0, Total=4160 [2020-09-24 20:42:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-24 20:42:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 222. [2020-09-24 20:42:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-24 20:42:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 242 transitions. [2020-09-24 20:42:39,357 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 242 transitions. Word has length 115 [2020-09-24 20:42:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:39,357 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 242 transitions. [2020-09-24 20:42:39,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 20:42:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 242 transitions. [2020-09-24 20:42:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-24 20:42:39,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:39,359 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:39,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:42:39,360 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1978260782, now seen corresponding path program 8 times [2020-09-24 20:42:39,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:39,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024754652] [2020-09-24 20:42:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:39,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:39,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking...