/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:58:41,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:58:41,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:58:41,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:58:41,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:58:41,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:58:41,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:58:41,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:58:41,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:58:41,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:58:41,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:58:41,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:58:41,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:58:41,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:58:41,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:58:41,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:58:41,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:58:41,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:58:41,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:58:41,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:58:41,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:58:41,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:58:41,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:58:41,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:58:41,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:58:41,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:58:41,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:58:41,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:58:41,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:58:41,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:58:41,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:58:41,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:58:41,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:58:41,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:58:41,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:58:41,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:58:41,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:58:41,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:58:41,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:58:41,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:58:41,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:58:41,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 04:58:41,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:58:41,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:58:41,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:58:41,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:58:41,231 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:58:41,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:58:41,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:58:41,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:58:41,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:58:41,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:58:41,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:58:41,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:58:41,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:58:41,232 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:58:41,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:58:41,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:58:41,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:58:41,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:58:41,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:58:41,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:58:41,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:58:41,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:58:41,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:58:41,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:58:41,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:58:41,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:58:41,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:58:41,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:58:41,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:58:41,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:58:41,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:58:41,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:58:41,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:58:41,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:58:41,561 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:58:41,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-10-14 04:58:41,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b57da30f/6e3d76076ecc4d8cbea81cb8de2863f5/FLAG533e9f212 [2020-10-14 04:58:42,038 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:58:42,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-10-14 04:58:42,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b57da30f/6e3d76076ecc4d8cbea81cb8de2863f5/FLAG533e9f212 [2020-10-14 04:58:42,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b57da30f/6e3d76076ecc4d8cbea81cb8de2863f5 [2020-10-14 04:58:42,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:58:42,455 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:58:42,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:58:42,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:58:42,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:58:42,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a56ccca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42, skipping insertion in model container [2020-10-14 04:58:42,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:58:42,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:58:42,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:58:42,683 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:58:42,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:58:42,807 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:58:42,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42 WrapperNode [2020-10-14 04:58:42,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:58:42,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:58:42,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:58:42,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:58:42,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... [2020-10-14 04:58:42,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:58:42,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:58:42,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:58:42,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:58:42,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:58:42,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:58:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:58:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-14 04:58:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:58:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:58:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 04:58:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 04:58:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 04:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 04:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 04:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 04:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:58:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:58:43,229 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:58:43,229 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 04:58:43,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:58:43 BoogieIcfgContainer [2020-10-14 04:58:43,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:58:43,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:58:43,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:58:43,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:58:43,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:58:42" (1/3) ... [2020-10-14 04:58:43,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fde5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:58:43, skipping insertion in model container [2020-10-14 04:58:43,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:58:42" (2/3) ... [2020-10-14 04:58:43,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fde5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:58:43, skipping insertion in model container [2020-10-14 04:58:43,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:58:43" (3/3) ... [2020-10-14 04:58:43,244 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-10-14 04:58:43,255 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:58:43,263 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:58:43,278 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:58:43,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:58:43,302 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:58:43,302 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:58:43,302 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:58:43,302 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:58:43,303 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:58:43,303 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:58:43,303 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:58:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 04:58:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 04:58:43,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:43,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:43,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:43,334 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-10-14 04:58:43,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:43,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136260031] [2020-10-14 04:58:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:43,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:43,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:43,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:43,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 04:58:43,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:58:43,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-14 04:58:43,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:43,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:43,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:43,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 04:58:43,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:43,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 04:58:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:43,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:43,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:43,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:43,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 04:58:43,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:43,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:43,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:43,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:43,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 04:58:43,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-14 04:58:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:43,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:43,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:43,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:43,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:43,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 04:58:43,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:43,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:43,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:43,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:43,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:43,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 04:58:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:43,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136260031] [2020-10-14 04:58:43,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:58:43,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 04:58:43,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163155598] [2020-10-14 04:58:43,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 04:58:43,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 04:58:43,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 04:58:43,894 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-14 04:58:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:43,988 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-14 04:58:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 04:58:43,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 04:58:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:44,001 INFO L225 Difference]: With dead ends: 42 [2020-10-14 04:58:44,001 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 04:58:44,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 04:58:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 04:58:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 04:58:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 04:58:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 04:58:44,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-14 04:58:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:44,048 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 04:58:44,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 04:58:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 04:58:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 04:58:44,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:44,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:44,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:58:44,051 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-10-14 04:58:44,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:44,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226810428] [2020-10-14 04:58:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 04:58:44,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 04:58:44,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:58:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:58:44,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 04:58:44,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:44,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:58:44,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:44,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 04:58:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:44,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 04:58:44,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:44,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226810428] [2020-10-14 04:58:44,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:58:44,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 04:58:44,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671340411] [2020-10-14 04:58:44,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:58:44,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:58:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:58:44,309 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-10-14 04:58:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:44,372 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-14 04:58:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 04:58:44,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 04:58:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:44,374 INFO L225 Difference]: With dead ends: 34 [2020-10-14 04:58:44,374 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 04:58:44,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:58:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 04:58:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 04:58:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 04:58:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-14 04:58:44,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-14 04:58:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:44,383 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-14 04:58:44,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:58:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-14 04:58:44,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 04:58:44,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:44,385 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] [2020-10-14 04:58:44,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:58:44,386 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-10-14 04:58:44,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:44,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410679123] [2020-10-14 04:58:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 04:58:44,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-14 04:58:44,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 04:58:44,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:44,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 04:58:44,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:44,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:44,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 04:58:44,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:44,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:44,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:44,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:44,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 04:58:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:44,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 04:58:44,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:44,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:44,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:44,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:44,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410679123] [2020-10-14 04:58:44,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:44,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 04:58:44,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205041796] [2020-10-14 04:58:44,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 04:58:44,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:44,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 04:58:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:58:44,642 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-14 04:58:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:44,733 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-14 04:58:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 04:58:44,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 04:58:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:44,735 INFO L225 Difference]: With dead ends: 36 [2020-10-14 04:58:44,735 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 04:58:44,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:58:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 04:58:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 04:58:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 04:58:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-14 04:58:44,747 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-14 04:58:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:44,748 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-14 04:58:44,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 04:58:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-14 04:58:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 04:58:44,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:44,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:44,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 04:58:44,751 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-10-14 04:58:44,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:44,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928569446] [2020-10-14 04:58:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:44,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:44,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 04:58:44,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:44,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-14 04:58:44,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:44,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:58:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 04:58:44,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 04:58:45,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:45,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 04:58:45,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:45,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 04:58:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:45,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 04:58:45,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:45,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:45,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:45,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:45,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928569446] [2020-10-14 04:58:45,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:45,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 04:58:45,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006172864] [2020-10-14 04:58:45,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 04:58:45,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:45,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 04:58:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:58:45,036 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-14 04:58:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:45,110 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-14 04:58:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 04:58:45,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 04:58:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:45,111 INFO L225 Difference]: With dead ends: 38 [2020-10-14 04:58:45,111 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 04:58:45,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:58:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 04:58:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 04:58:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 04:58:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-14 04:58:45,118 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-14 04:58:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:45,119 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-14 04:58:45,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 04:58:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-14 04:58:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 04:58:45,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:45,120 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:45,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 04:58:45,120 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-10-14 04:58:45,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:45,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234285731] [2020-10-14 04:58:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 04:58:45,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 04:58:45,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 04:58:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 04:58:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:45,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:45,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:45,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 04:58:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:45,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:58:45,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:45,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:45,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:45,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:45,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234285731] [2020-10-14 04:58:45,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:45,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 04:58:45,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753799523] [2020-10-14 04:58:45,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 04:58:45,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 04:58:45,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 04:58:45,324 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-10-14 04:58:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:45,398 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-14 04:58:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 04:58:45,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 04:58:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:45,400 INFO L225 Difference]: With dead ends: 40 [2020-10-14 04:58:45,400 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 04:58:45,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 04:58:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 04:58:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 04:58:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 04:58:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-14 04:58:45,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-14 04:58:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:45,407 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-14 04:58:45,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 04:58:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-14 04:58:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 04:58:45,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:45,409 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:45,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 04:58:45,410 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:45,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-10-14 04:58:45,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:45,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760855429] [2020-10-14 04:58:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 04:58:45,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-14 04:58:45,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 04:58:45,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:45,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 04:58:45,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:45,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:45,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 04:58:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:45,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:45,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:45,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:58:45,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:45,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:45,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:45,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:45,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760855429] [2020-10-14 04:58:45,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:45,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 04:58:45,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547717312] [2020-10-14 04:58:45,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 04:58:45,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 04:58:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 04:58:45,718 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-10-14 04:58:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:45,787 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-14 04:58:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 04:58:45,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 04:58:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:45,789 INFO L225 Difference]: With dead ends: 42 [2020-10-14 04:58:45,789 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 04:58:45,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 04:58:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 04:58:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 04:58:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 04:58:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-14 04:58:45,795 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-14 04:58:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:45,795 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-14 04:58:45,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 04:58:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-14 04:58:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 04:58:45,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:45,797 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:45,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 04:58:45,797 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-10-14 04:58:45,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:45,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612174456] [2020-10-14 04:58:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 04:58:46,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-14 04:58:46,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 04:58:46,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:46,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 04:58:46,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:46,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:46,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:46,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:46,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:46,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 04:58:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:46,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:46,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:46,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:46,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:46,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612174456] [2020-10-14 04:58:46,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:46,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 04:58:46,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388488539] [2020-10-14 04:58:46,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 04:58:46,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 04:58:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 04:58:46,106 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-10-14 04:58:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:46,182 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-14 04:58:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 04:58:46,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-14 04:58:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:46,184 INFO L225 Difference]: With dead ends: 44 [2020-10-14 04:58:46,184 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 04:58:46,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 04:58:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 04:58:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 04:58:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 04:58:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-14 04:58:46,190 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-14 04:58:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:46,191 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-14 04:58:46,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 04:58:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-14 04:58:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 04:58:46,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:46,192 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:46,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 04:58:46,192 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-10-14 04:58:46,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:46,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978582862] [2020-10-14 04:58:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 04:58:46,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-14 04:58:46,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 04:58:46,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:46,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 04:58:46,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:46,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:46,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:46,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:46,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:46,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:46,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:46,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 04:58:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:46,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:46,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:46,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:46,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:46,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:46,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978582862] [2020-10-14 04:58:46,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:46,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 04:58:46,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830521219] [2020-10-14 04:58:46,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 04:58:46,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 04:58:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:58:46,535 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-10-14 04:58:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:46,633 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-14 04:58:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 04:58:46,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-14 04:58:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:46,634 INFO L225 Difference]: With dead ends: 46 [2020-10-14 04:58:46,634 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 04:58:46,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:58:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 04:58:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 04:58:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 04:58:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-14 04:58:46,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-14 04:58:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:46,645 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-14 04:58:46,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 04:58:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-14 04:58:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 04:58:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:46,649 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 04:58:46,650 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-10-14 04:58:46,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:46,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877739349] [2020-10-14 04:58:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:46,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:46,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 04:58:46,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:46,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-14 04:58:46,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:46,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 04:58:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 04:58:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:47,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:47,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:47,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:47,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:47,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:47,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:47,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:47,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:47,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:47,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:47,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:47,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 04:58:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:47,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:47,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:47,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:47,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:47,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:47,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:47,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:47,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:47,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:47,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:47,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:47,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877739349] [2020-10-14 04:58:47,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:47,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 04:58:47,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000905670] [2020-10-14 04:58:47,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 04:58:47,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 04:58:47,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 04:58:47,084 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-10-14 04:58:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:47,175 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-14 04:58:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 04:58:47,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-14 04:58:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:47,176 INFO L225 Difference]: With dead ends: 48 [2020-10-14 04:58:47,177 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 04:58:47,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 04:58:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 04:58:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 04:58:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 04:58:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-14 04:58:47,187 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-14 04:58:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:47,188 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-14 04:58:47,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 04:58:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-14 04:58:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 04:58:47,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:47,191 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:47,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 04:58:47,191 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:47,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-10-14 04:58:47,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:47,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969072932] [2020-10-14 04:58:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:47,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:47,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 04:58:47,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-14 04:58:47,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:47,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 04:58:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 04:58:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:47,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:47,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:47,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:47,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:47,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:47,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:58:47,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:47,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:47,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:47,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:47,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 04:58:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:47,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:47,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:47,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:47,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:58:47,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:47,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:47,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:47,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:47,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:47,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 04:58:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:47,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969072932] [2020-10-14 04:58:47,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:47,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 04:58:47,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531176016] [2020-10-14 04:58:47,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 04:58:47,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 04:58:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 04:58:47,836 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-10-14 04:58:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:47,961 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-14 04:58:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 04:58:47,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 04:58:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:47,963 INFO L225 Difference]: With dead ends: 50 [2020-10-14 04:58:47,964 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 04:58:47,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 04:58:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 04:58:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 04:58:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 04:58:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-14 04:58:47,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-14 04:58:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:47,981 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-14 04:58:47,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 04:58:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-14 04:58:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 04:58:48,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:48,005 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:48,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 04:58:48,005 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:48,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-10-14 04:58:48,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:48,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988149373] [2020-10-14 04:58:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:48,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:48,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:48,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 04:58:48,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:48,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-14 04:58:48,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:48,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 04:58:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 04:58:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:48,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:48,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:48,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:48,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:48,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:48,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:48,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:48,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 04:58:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:48,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:48,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:48,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:48,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:48,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:48,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:48,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 04:58:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:48,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988149373] [2020-10-14 04:58:48,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:48,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 04:58:48,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019927272] [2020-10-14 04:58:48,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 04:58:48,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 04:58:48,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 04:58:48,665 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-10-14 04:58:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:48,777 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-14 04:58:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 04:58:48,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 04:58:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:48,779 INFO L225 Difference]: With dead ends: 52 [2020-10-14 04:58:48,779 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 04:58:48,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 04:58:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 04:58:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 04:58:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 04:58:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-14 04:58:48,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-14 04:58:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:48,793 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-14 04:58:48,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 04:58:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-14 04:58:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 04:58:48,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:48,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:48,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 04:58:48,798 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-10-14 04:58:48,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:48,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508430140] [2020-10-14 04:58:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:49,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:49,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 04:58:49,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:49,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-14 04:58:49,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:49,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 04:58:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 04:58:49,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:49,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:49,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:49,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:49,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:49,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:49,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:49,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:49,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:49,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:49,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:49,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 04:58:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:49,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:49,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:49,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:49,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:49,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:49,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:49,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:49,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:49,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508430140] [2020-10-14 04:58:49,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:49,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 04:58:49,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833744489] [2020-10-14 04:58:49,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 04:58:49,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 04:58:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 04:58:49,639 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-10-14 04:58:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:49,743 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-14 04:58:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 04:58:49,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-14 04:58:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:49,745 INFO L225 Difference]: With dead ends: 54 [2020-10-14 04:58:49,745 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 04:58:49,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 04:58:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 04:58:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 04:58:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 04:58:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-14 04:58:49,753 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-14 04:58:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:49,754 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-14 04:58:49,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 04:58:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-14 04:58:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 04:58:49,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:49,755 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:49,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 04:58:49,756 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-10-14 04:58:49,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:49,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215775182] [2020-10-14 04:58:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:50,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:50,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 04:58:50,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-14 04:58:50,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:50,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 04:58:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 04:58:50,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:50,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:50,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:50,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:50,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:50,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:58:50,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:50,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 04:58:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:50,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:50,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:50,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:50,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:50,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:50,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:50,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:50,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:50,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215775182] [2020-10-14 04:58:50,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:50,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 04:58:50,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612279769] [2020-10-14 04:58:50,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 04:58:50,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 04:58:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:58:50,500 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-14 04:58:50,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:50,599 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-14 04:58:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 04:58:50,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-14 04:58:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:50,601 INFO L225 Difference]: With dead ends: 56 [2020-10-14 04:58:50,601 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 04:58:50,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:58:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 04:58:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 04:58:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 04:58:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-14 04:58:50,606 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-14 04:58:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:50,607 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-14 04:58:50,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 04:58:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-14 04:58:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 04:58:50,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:50,608 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:50,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 04:58:50,608 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-10-14 04:58:50,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:50,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601575167] [2020-10-14 04:58:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:50,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:51,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:51,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 04:58:51,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:51,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 748 [2020-10-14 04:58:51,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:51,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:51,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 04:58:51,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:51,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 04:58:51,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:51,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:51,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:51,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:51,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:51,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:51,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:51,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:51,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:51,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:51,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:51,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:51,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 04:58:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:51,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:51,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:51,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:51,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:51,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:51,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:51,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:51,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:51,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:51,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601575167] [2020-10-14 04:58:51,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:51,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 04:58:51,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620773617] [2020-10-14 04:58:51,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 04:58:51,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 04:58:51,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 04:58:51,547 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-10-14 04:58:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:51,637 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-14 04:58:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 04:58:51,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-14 04:58:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:51,638 INFO L225 Difference]: With dead ends: 58 [2020-10-14 04:58:51,638 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 04:58:51,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 04:58:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 04:58:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 04:58:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 04:58:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-14 04:58:51,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-14 04:58:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:51,645 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-14 04:58:51,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 04:58:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-14 04:58:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 04:58:51,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:51,647 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:51,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 04:58:51,647 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-10-14 04:58:51,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:51,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438393545] [2020-10-14 04:58:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:51,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:52,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:52,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 04:58:52,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:52,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-14 04:58:52,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:52,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:52,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 04:58:52,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:52,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 04:58:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:52,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:52,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:52,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:52,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:58:52,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:52,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:52,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:52,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 04:58:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:52,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:52,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:52,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:52,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:52,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:52,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:52,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:52,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:52,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:52,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:52,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:52,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438393545] [2020-10-14 04:58:52,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:52,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 04:58:52,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596420298] [2020-10-14 04:58:52,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 04:58:52,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:52,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 04:58:52,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 04:58:52,776 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-10-14 04:58:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:52,892 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-14 04:58:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 04:58:52,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-14 04:58:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:52,894 INFO L225 Difference]: With dead ends: 60 [2020-10-14 04:58:52,894 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 04:58:52,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 04:58:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 04:58:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 04:58:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 04:58:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 04:58:52,908 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-14 04:58:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:52,910 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 04:58:52,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 04:58:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 04:58:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 04:58:52,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:52,912 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:52,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 04:58:52,913 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-10-14 04:58:52,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:52,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664570678] [2020-10-14 04:58:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:52,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:53,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:53,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 04:58:53,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:53,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-14 04:58:53,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:53,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 04:58:53,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:53,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 04:58:53,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:53,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:53,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:53,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:53,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:53,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:53,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:53,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:53,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-14 04:58:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:53,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:53,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:53,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:58:53,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:53,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:53,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:54,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664570678] [2020-10-14 04:58:54,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:54,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 04:58:54,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016206957] [2020-10-14 04:58:54,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 04:58:54,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 04:58:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 04:58:54,007 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-10-14 04:58:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:54,136 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-14 04:58:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 04:58:54,137 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-14 04:58:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:54,138 INFO L225 Difference]: With dead ends: 62 [2020-10-14 04:58:54,138 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 04:58:54,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 04:58:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 04:58:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 04:58:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 04:58:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-14 04:58:54,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-14 04:58:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:54,143 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-14 04:58:54,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 04:58:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-14 04:58:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 04:58:54,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:54,144 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:54,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 04:58:54,145 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-10-14 04:58:54,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:54,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915902977] [2020-10-14 04:58:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:55,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:55,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 04:58:55,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:55,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-14 04:58:55,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:55,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 04:58:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 04:58:55,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:55,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:55,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:55,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:55,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:55,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:58:55,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:55,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:55,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:55,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 04:58:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:55,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:55,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:55,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:55,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:55,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:55,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:55,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:55,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915902977] [2020-10-14 04:58:55,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:55,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 04:58:55,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657041602] [2020-10-14 04:58:55,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 04:58:55,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:55,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 04:58:55,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 04:58:55,410 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-10-14 04:58:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:55,502 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 04:58:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 04:58:55,502 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-14 04:58:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:55,503 INFO L225 Difference]: With dead ends: 64 [2020-10-14 04:58:55,503 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 04:58:55,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 04:58:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 04:58:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 04:58:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 04:58:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-14 04:58:55,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-14 04:58:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:55,509 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-14 04:58:55,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 04:58:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-14 04:58:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 04:58:55,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:55,510 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:55,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 04:58:55,511 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-10-14 04:58:55,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:55,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230010249] [2020-10-14 04:58:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:56,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:56,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 04:58:56,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:56,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-14 04:58:56,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:56,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 04:58:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:56,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 04:58:56,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:56,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:56,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:56,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:56,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:58:56,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:56,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:56,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:56,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 04:58:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:56,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:56,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:56,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:56,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:56,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:56,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:56,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:56,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:58:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:56,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230010249] [2020-10-14 04:58:56,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:56,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 04:58:56,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160328898] [2020-10-14 04:58:56,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 04:58:56,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 04:58:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 04:58:56,888 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-10-14 04:58:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:56,992 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-14 04:58:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 04:58:56,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-14 04:58:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:56,993 INFO L225 Difference]: With dead ends: 66 [2020-10-14 04:58:56,993 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 04:58:56,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 04:58:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 04:58:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 04:58:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 04:58:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-14 04:58:56,998 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-14 04:58:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:56,998 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-14 04:58:56,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 04:58:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-14 04:58:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 04:58:56,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:56,999 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:56,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 04:58:56,999 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:57,000 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-10-14 04:58:57,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:57,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077530251] [2020-10-14 04:58:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:58,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:58,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 04:58:58,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1533 [2020-10-14 04:58:58,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:58,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 04:58:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:58:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 04:58:58,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:58,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:58:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:58,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:58,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:58,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:58:58,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:58,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:58:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 04:58:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:58:58,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:58:58,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:58:58,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:58:58,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:58:58,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:58:58,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:58:58,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:58:58,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:58:58,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:58:58,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:58:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:58:58,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077530251] [2020-10-14 04:58:58,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:58:58,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 04:58:58,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879811042] [2020-10-14 04:58:58,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 04:58:58,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:58:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 04:58:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 04:58:58,875 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-10-14 04:58:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:58:59,009 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-14 04:58:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 04:58:59,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-14 04:58:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:58:59,011 INFO L225 Difference]: With dead ends: 68 [2020-10-14 04:58:59,011 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 04:58:59,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 04:58:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 04:58:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 04:58:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 04:58:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-14 04:58:59,018 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-14 04:58:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:58:59,018 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-14 04:58:59,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 04:58:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-14 04:58:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 04:58:59,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:58:59,019 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:58:59,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 04:58:59,020 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:58:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:58:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-10-14 04:58:59,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:58:59,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468017265] [2020-10-14 04:58:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:58:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:58:59,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:00,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:00,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 04:59:00,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:00,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-14 04:59:00,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:00,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:00,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 04:59:00,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:59:00,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 04:59:00,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:00,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:00,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:00,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:00,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:00,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:00,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:59:00,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:00,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:00,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:00,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:00,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:00,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:00,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 04:59:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:00,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:00,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:00,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:00,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:00,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:00,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:59:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:59:00,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468017265] [2020-10-14 04:59:00,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:00,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 04:59:00,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453889785] [2020-10-14 04:59:00,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 04:59:00,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:00,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 04:59:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 04:59:00,825 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-10-14 04:59:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:00,926 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-14 04:59:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 04:59:00,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-14 04:59:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:00,927 INFO L225 Difference]: With dead ends: 70 [2020-10-14 04:59:00,927 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 04:59:00,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 04:59:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 04:59:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 04:59:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 04:59:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-14 04:59:00,932 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-14 04:59:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:00,934 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-14 04:59:00,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 04:59:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-14 04:59:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 04:59:00,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:00,935 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:00,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 04:59:00,935 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-10-14 04:59:00,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:00,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307342825] [2020-10-14 04:59:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:00,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:02,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:02,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 04:59:02,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:02,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1786 [2020-10-14 04:59:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:02,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 04:59:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:59:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 04:59:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:02,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:03,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:03,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:03,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:03,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:03,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:03,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:03,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:03,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:03,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:03,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:03,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 04:59:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:03,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:03,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:03,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:03,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:03,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:59:03,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:03,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:03,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:03,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:59:03,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:03,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:59:03,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307342825] [2020-10-14 04:59:03,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:03,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 04:59:03,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825018648] [2020-10-14 04:59:03,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 04:59:03,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:03,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 04:59:03,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 04:59:03,019 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-10-14 04:59:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:03,153 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-14 04:59:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 04:59:03,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-14 04:59:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:03,154 INFO L225 Difference]: With dead ends: 71 [2020-10-14 04:59:03,154 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 04:59:03,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 04:59:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 04:59:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 04:59:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 04:59:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-14 04:59:03,160 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-14 04:59:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:03,161 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-14 04:59:03,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 04:59:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-14 04:59:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 04:59:03,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:03,162 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:03,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 04:59:03,162 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-10-14 04:59:03,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:03,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432434681] [2020-10-14 04:59:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 04:59:03,212 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 04:59:03,212 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 04:59:03,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 04:59:03,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:59:03 BoogieIcfgContainer [2020-10-14 04:59:03,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 04:59:03,273 INFO L168 Benchmark]: Toolchain (without parser) took 20812.80 ms. Allocated memory was 148.4 MB in the beginning and 492.3 MB in the end (delta: 343.9 MB). Free memory was 104.1 MB in the beginning and 247.0 MB in the end (delta: -142.9 MB). Peak memory consumption was 201.0 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:03,273 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 04:59:03,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.95 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 104.1 MB in the beginning and 183.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:03,275 INFO L168 Benchmark]: Boogie Preprocessor took 64.89 ms. Allocated memory is still 205.0 MB. Free memory was 183.7 MB in the beginning and 181.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:03,276 INFO L168 Benchmark]: RCFGBuilder took 361.22 ms. Allocated memory is still 205.0 MB. Free memory was 181.4 MB in the beginning and 165.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:03,279 INFO L168 Benchmark]: TraceAbstraction took 20029.17 ms. Allocated memory was 205.0 MB in the beginning and 492.3 MB in the end (delta: 287.3 MB). Free memory was 165.9 MB in the beginning and 247.0 MB in the end (delta: -81.1 MB). Peak memory consumption was 206.2 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:03,282 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.95 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 104.1 MB in the beginning and 183.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.89 ms. Allocated memory is still 205.0 MB. Free memory was 183.7 MB in the beginning and 181.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.22 ms. Allocated memory is still 205.0 MB. Free memory was 181.4 MB in the beginning and 165.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20029.17 ms. Allocated memory was 205.0 MB in the beginning and 492.3 MB in the end (delta: 287.3 MB). Free memory was 165.9 MB in the beginning and 247.0 MB in the end (delta: -81.1 MB). Peak memory consumption was 206.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.9s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...