/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:37:59,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:37:59,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:37:59,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:37:59,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:37:59,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:37:59,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:37:59,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:37:59,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:37:59,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:37:59,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:37:59,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:37:59,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:37:59,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:37:59,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:37:59,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:37:59,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:37:59,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:37:59,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:37:59,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:37:59,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:37:59,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:37:59,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:37:59,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:37:59,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:37:59,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:37:59,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:37:59,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:37:59,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:37:59,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:37:59,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:37:59,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:37:59,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:37:59,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:37:59,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:37:59,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:37:59,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:37:59,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:37:59,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:37:59,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:37:59,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:37:59,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:37:59,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:37:59,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:37:59,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:37:59,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:37:59,235 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:37:59,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:37:59,235 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:37:59,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:37:59,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:37:59,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:37:59,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:37:59,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:37:59,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:37:59,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:37:59,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:37:59,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:37:59,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:37:59,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:37:59,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:37:59,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:37:59,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:37:59,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:37:59,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:37:59,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:37:59,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:37:59,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:37:59,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:37:59,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:37:59,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:37:59,240 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:37:59,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:37:59,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:37:59,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:37:59,677 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:37:59,678 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:37:59,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2020-10-13 04:37:59,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13885c8b4/04d313c6829d4f05a54f6f39768b9ac8/FLAGd4bb587bc [2020-10-13 04:38:00,542 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:00,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2020-10-13 04:38:00,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13885c8b4/04d313c6829d4f05a54f6f39768b9ac8/FLAGd4bb587bc [2020-10-13 04:38:00,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13885c8b4/04d313c6829d4f05a54f6f39768b9ac8 [2020-10-13 04:38:00,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:00,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:00,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:00,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:00,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:00,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:00" (1/1) ... [2020-10-13 04:38:00,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1573d552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:00, skipping insertion in model container [2020-10-13 04:38:00,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:00" (1/1) ... [2020-10-13 04:38:00,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:00,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:01,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:01,169 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:01,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:01,232 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:01,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01 WrapperNode [2020-10-13 04:38:01,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:01,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:01,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:01,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:01,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... [2020-10-13 04:38:01,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:01,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:01,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:01,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:01,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:01,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:01,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:01,520 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:38:01,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:01,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:38:01,524 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:38:01,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 04:38:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 04:38:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 04:38:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:01,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:02,133 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:02,134 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-13 04:38:02,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:02 BoogieIcfgContainer [2020-10-13 04:38:02,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:02,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:02,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:02,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:02,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:00" (1/3) ... [2020-10-13 04:38:02,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd675a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:02, skipping insertion in model container [2020-10-13 04:38:02,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:01" (2/3) ... [2020-10-13 04:38:02,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd675a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:02, skipping insertion in model container [2020-10-13 04:38:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:02" (3/3) ... [2020-10-13 04:38:02,156 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2020-10-13 04:38:02,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:02,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:02,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:02,246 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:02,247 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:02,247 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:02,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:02,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:02,247 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:02,248 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:02,248 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-13 04:38:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:02,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:02,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:02,286 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash -449577023, now seen corresponding path program 1 times [2020-10-13 04:38:02,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:02,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328809838] [2020-10-13 04:38:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:02,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:02,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:02,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:02,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:03,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:04,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:05,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:06,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:06,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 04:38:06,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3996 [2020-10-13 04:38:06,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:38:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:06,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:38:06,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:06,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:06,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:06,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:06,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:38:06,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:06,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:06,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:06,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:06,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:06,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328809838] [2020-10-13 04:38:06,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:06,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:38:06,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463058679] [2020-10-13 04:38:06,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:38:06,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:06,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:38:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:06,668 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-10-13 04:38:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:06,876 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2020-10-13 04:38:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:38:06,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 04:38:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:06,899 INFO L225 Difference]: With dead ends: 93 [2020-10-13 04:38:06,900 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:38:06,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:38:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 04:38:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:38:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-13 04:38:06,960 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2020-10-13 04:38:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:06,960 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-13 04:38:06,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:38:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-13 04:38:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:06,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:06,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:06,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:06,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -860066781, now seen corresponding path program 1 times [2020-10-13 04:38:06,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:06,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389202948] [2020-10-13 04:38:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:06,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:11,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:11,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:38:11,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:38:11,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 04:38:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:12,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:12,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:12,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:12,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:12,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:12,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:12,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389202948] [2020-10-13 04:38:12,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:12,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:12,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927918192] [2020-10-13 04:38:12,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:12,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:12,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:12,055 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 4 states. [2020-10-13 04:38:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:12,226 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2020-10-13 04:38:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:12,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-13 04:38:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:12,228 INFO L225 Difference]: With dead ends: 81 [2020-10-13 04:38:12,229 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:38:12,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:38:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 04:38:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 04:38:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-13 04:38:12,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2020-10-13 04:38:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:12,240 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-13 04:38:12,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-13 04:38:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:38:12,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:12,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:12,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:12,242 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:12,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1264746561, now seen corresponding path program 1 times [2020-10-13 04:38:12,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:12,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522592534] [2020-10-13 04:38:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:12,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:38:17,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:38:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:38:17,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:17,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:17,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:17,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:17,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:17,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:17,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:17,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:17,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:17,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:17,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522592534] [2020-10-13 04:38:17,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:17,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:17,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606274532] [2020-10-13 04:38:17,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:17,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:17,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:17,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:17,319 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 5 states. [2020-10-13 04:38:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:17,528 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-13 04:38:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:17,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-13 04:38:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:17,530 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:38:17,530 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:38:17,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:38:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 04:38:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:38:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-13 04:38:17,539 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 34 [2020-10-13 04:38:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:17,539 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-13 04:38:17,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-13 04:38:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:38:17,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:17,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:17,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:17,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1194064673, now seen corresponding path program 2 times [2020-10-13 04:38:17,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:17,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466450316] [2020-10-13 04:38:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:17,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:17,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:19,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:38:22,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:38:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:38:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:22,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:22,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:22,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:22,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:22,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:22,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:22,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:22,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:22,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:22,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:22,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466450316] [2020-10-13 04:38:22,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:22,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:38:22,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677350681] [2020-10-13 04:38:22,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:22,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:22,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:22,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:22,609 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 5 states. [2020-10-13 04:38:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:22,839 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-10-13 04:38:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:22,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-13 04:38:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:22,842 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:38:22,842 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:38:22,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:38:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-10-13 04:38:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:38:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-10-13 04:38:22,853 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 36 [2020-10-13 04:38:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:22,853 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-10-13 04:38:22,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-10-13 04:38:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:38:22,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:22,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:22,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:22,855 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash -15679285, now seen corresponding path program 1 times [2020-10-13 04:38:22,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:22,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448753743] [2020-10-13 04:38:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:22,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:38:27,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:38:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:38:27,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:27,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:27,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:27,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:27,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:27,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:27,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 04:38:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448753743] [2020-10-13 04:38:27,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:27,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:27,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197755828] [2020-10-13 04:38:27,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:27,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:27,981 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 6 states. [2020-10-13 04:38:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:28,419 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-13 04:38:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:28,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-13 04:38:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:28,421 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:38:28,421 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:38:28,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:38:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 04:38:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:38:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-13 04:38:28,440 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2020-10-13 04:38:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:28,440 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-13 04:38:28,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-13 04:38:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:38:28,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:28,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:28,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:28,446 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1195572919, now seen corresponding path program 2 times [2020-10-13 04:38:28,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:28,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810582068] [2020-10-13 04:38:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:33,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:38:33,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:38:33,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:38:33,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:33,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 04:38:33,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:33,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:38:33,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:35,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:35,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:35,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:35,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:35,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:35,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:35,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:35,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:35,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:36,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810582068] [2020-10-13 04:38:36,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:36,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:38:36,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403924807] [2020-10-13 04:38:36,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:38:36,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:38:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:38:36,009 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 41 states. [2020-10-13 04:38:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:39,588 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2020-10-13 04:38:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:38:39,589 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2020-10-13 04:38:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:39,590 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:38:39,591 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 04:38:39,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=265, Invalid=2597, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 04:38:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 04:38:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 130. [2020-10-13 04:38:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:38:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2020-10-13 04:38:39,623 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2020-10-13 04:38:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:39,625 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2020-10-13 04:38:39,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:38:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2020-10-13 04:38:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:38:39,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:39,633 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:39,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:39,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1341042069, now seen corresponding path program 3 times [2020-10-13 04:38:39,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:39,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375852745] [2020-10-13 04:38:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:38:44,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:38:44,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:38:44,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:44,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:44,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:44,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:44,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:44,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:44,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:44,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:44,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:44,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:44,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:38:44,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375852745] [2020-10-13 04:38:44,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:44,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:44,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294865490] [2020-10-13 04:38:44,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:44,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:44,755 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 10 states. [2020-10-13 04:38:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:45,327 INFO L93 Difference]: Finished difference Result 284 states and 330 transitions. [2020-10-13 04:38:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:45,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-13 04:38:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:45,330 INFO L225 Difference]: With dead ends: 284 [2020-10-13 04:38:45,330 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 04:38:45,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 04:38:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2020-10-13 04:38:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:38:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2020-10-13 04:38:45,361 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2020-10-13 04:38:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:45,361 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2020-10-13 04:38:45,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2020-10-13 04:38:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:38:45,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:45,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:45,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:45,365 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1801600307, now seen corresponding path program 4 times [2020-10-13 04:38:45,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:45,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639091554] [2020-10-13 04:38:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:38:50,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:38:50,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:38:50,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:50,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:38:50,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:38:50,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:50,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:50,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:50,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:50,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:50,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:50,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-13 04:38:50,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639091554] [2020-10-13 04:38:50,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:50,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:50,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643773476] [2020-10-13 04:38:50,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:50,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:50,485 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand 10 states. [2020-10-13 04:38:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:51,013 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2020-10-13 04:38:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:51,014 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-13 04:38:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:51,015 INFO L225 Difference]: With dead ends: 152 [2020-10-13 04:38:51,015 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:38:51,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:38:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 04:38:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 04:38:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-13 04:38:51,024 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2020-10-13 04:38:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:51,024 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-13 04:38:51,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-13 04:38:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:38:51,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:51,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:51,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:51,026 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1668276929, now seen corresponding path program 5 times [2020-10-13 04:38:51,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:51,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395506145] [2020-10-13 04:38:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:56,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:56,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:38:56,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:56,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:38:56,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:57,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:57,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:57,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:57,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:38:57,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395506145] [2020-10-13 04:38:57,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:57,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:38:57,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921100415] [2020-10-13 04:38:57,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:38:57,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:38:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:38:57,435 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 23 states. [2020-10-13 04:38:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:59,205 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2020-10-13 04:38:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:38:59,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-10-13 04:38:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:59,208 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:38:59,208 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 04:38:59,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 26 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:38:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 04:38:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-10-13 04:38:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:38:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2020-10-13 04:38:59,224 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2020-10-13 04:38:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:59,224 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2020-10-13 04:38:59,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:38:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2020-10-13 04:38:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:38:59,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:59,226 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:59,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:38:59,226 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash 119858975, now seen corresponding path program 6 times [2020-10-13 04:38:59,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:59,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736251095] [2020-10-13 04:38:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:59,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:59,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:04,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:04,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:39:04,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:39:04,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:39:04,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:04,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:04,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:39:04,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:04,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:04,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:04,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:04,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:04,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:04,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:04,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:04,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:04,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:04,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:39:04,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736251095] [2020-10-13 04:39:04,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:04,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:04,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749790150] [2020-10-13 04:39:04,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:04,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:04,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:04,359 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand 12 states. [2020-10-13 04:39:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:05,244 INFO L93 Difference]: Finished difference Result 360 states and 406 transitions. [2020-10-13 04:39:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:05,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-10-13 04:39:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:05,247 INFO L225 Difference]: With dead ends: 360 [2020-10-13 04:39:05,247 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 04:39:05,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:39:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 04:39:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-10-13 04:39:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 04:39:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2020-10-13 04:39:05,287 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 100 [2020-10-13 04:39:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:05,288 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2020-10-13 04:39:05,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2020-10-13 04:39:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:39:05,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:05,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:05,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:39:05,291 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash 965725245, now seen corresponding path program 7 times [2020-10-13 04:39:05,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:05,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525950934] [2020-10-13 04:39:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:05,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:09,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:10,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 04:39:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:39:10,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:10,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:10,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:10,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:10,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:10,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:10,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-13 04:39:10,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525950934] [2020-10-13 04:39:10,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:10,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:10,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86896705] [2020-10-13 04:39:10,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:10,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:10,426 INFO L87 Difference]: Start difference. First operand 183 states and 201 transitions. Second operand 12 states. [2020-10-13 04:39:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:11,231 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2020-10-13 04:39:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:11,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 102 [2020-10-13 04:39:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:11,233 INFO L225 Difference]: With dead ends: 190 [2020-10-13 04:39:11,234 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:39:11,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:39:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:39:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-13 04:39:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:39:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-10-13 04:39:11,249 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2020-10-13 04:39:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:11,251 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-10-13 04:39:11,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-10-13 04:39:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 04:39:11,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:11,256 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:11,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:39:11,257 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1988100939, now seen corresponding path program 8 times [2020-10-13 04:39:11,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:11,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423597092] [2020-10-13 04:39:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:16,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:16,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 04:39:16,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:39:16,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 04:39:16,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:16,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-13 04:39:16,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 04:39:16,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:19,256 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2020-10-13 04:39:19,422 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-10-13 04:39:20,684 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-13 04:39:20,914 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-13 04:39:21,163 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 04:39:21,801 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-13 04:39:22,017 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-10-13 04:39:22,520 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-13 04:39:22,771 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-13 04:39:23,019 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-13 04:39:23,234 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-13 04:39:23,462 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-13 04:39:23,683 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-13 04:39:24,290 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-13 04:39:24,480 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-13 04:39:24,851 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-13 04:39:25,163 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-13 04:39:25,437 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 04:39:25,700 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-13 04:39:28,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:28,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:28,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:28,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:28,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:28,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:28,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:29,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423597092] [2020-10-13 04:39:29,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:29,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-13 04:39:29,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777374934] [2020-10-13 04:39:29,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-13 04:39:29,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-13 04:39:29,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=5411, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 04:39:29,032 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 77 states. [2020-10-13 04:39:31,274 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-13 04:39:31,931 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-13 04:39:32,496 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 04:39:32,848 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-13 04:39:33,478 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-13 04:39:34,038 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-13 04:39:35,494 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-13 04:39:35,822 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-13 04:39:36,185 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-13 04:39:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:44,325 INFO L93 Difference]: Finished difference Result 279 states and 304 transitions. [2020-10-13 04:39:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 04:39:44,326 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 120 [2020-10-13 04:39:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:44,329 INFO L225 Difference]: With dead ends: 279 [2020-10-13 04:39:44,330 INFO L226 Difference]: Without dead ends: 263 [2020-10-13 04:39:44,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 16 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=1063, Invalid=11819, Unknown=0, NotChecked=0, Total=12882 [2020-10-13 04:39:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-13 04:39:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 206. [2020-10-13 04:39:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 04:39:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 225 transitions. [2020-10-13 04:39:44,354 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 225 transitions. Word has length 120 [2020-10-13 04:39:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:44,355 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 225 transitions. [2020-10-13 04:39:44,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-13 04:39:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 225 transitions. [2020-10-13 04:39:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:39:44,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:44,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:44,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:39:44,358 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1454031575, now seen corresponding path program 9 times [2020-10-13 04:39:44,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:44,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961000682] [2020-10-13 04:39:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:44,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:49,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:49,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:39:49,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:49,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:39:49,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:49,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:49,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:39:49,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:49,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:49,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:49,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:49,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:49,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:49,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:39:49,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961000682] [2020-10-13 04:39:49,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:49,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:49,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538369570] [2020-10-13 04:39:49,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:49,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:49,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:49,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:49,593 INFO L87 Difference]: Start difference. First operand 206 states and 225 transitions. Second operand 14 states. [2020-10-13 04:39:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:50,907 INFO L93 Difference]: Finished difference Result 501 states and 554 transitions. [2020-10-13 04:39:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:39:50,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 122 [2020-10-13 04:39:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:50,911 INFO L225 Difference]: With dead ends: 501 [2020-10-13 04:39:50,911 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 04:39:50,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:39:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 04:39:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 231. [2020-10-13 04:39:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-13 04:39:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 250 transitions. [2020-10-13 04:39:50,934 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 250 transitions. Word has length 122 [2020-10-13 04:39:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:50,934 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 250 transitions. [2020-10-13 04:39:50,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 250 transitions. [2020-10-13 04:39:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:39:50,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:50,936 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:50,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:39:50,937 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1653396119, now seen corresponding path program 10 times [2020-10-13 04:39:50,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:50,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538374714] [2020-10-13 04:39:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:55,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:55,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:39:55,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:55,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:39:55,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:55,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:55,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:55,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:39:55,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:56,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:56,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:56,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 04:39:56,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538374714] [2020-10-13 04:39:56,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:56,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:56,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673119279] [2020-10-13 04:39:56,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:56,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:56,120 INFO L87 Difference]: Start difference. First operand 231 states and 250 transitions. Second operand 14 states. [2020-10-13 04:39:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:57,206 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2020-10-13 04:39:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:39:57,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 122 [2020-10-13 04:39:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:57,209 INFO L225 Difference]: With dead ends: 238 [2020-10-13 04:39:57,209 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:39:57,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:39:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:39:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-13 04:39:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 04:39:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2020-10-13 04:39:57,223 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 122 [2020-10-13 04:39:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:57,223 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2020-10-13 04:39:57,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2020-10-13 04:39:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:39:57,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:57,225 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:57,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:39:57,226 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:57,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1580007339, now seen corresponding path program 11 times [2020-10-13 04:39:57,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:57,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858825173] [2020-10-13 04:39:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:01,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:04,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:04,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:40:04,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:04,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6702 [2020-10-13 04:40:04,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:04,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 108 [2020-10-13 04:40:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-13 04:40:04,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:09,047 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-13 04:40:09,280 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-13 04:40:10,347 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-13 04:40:10,842 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-13 04:40:11,093 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-13 04:40:13,177 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-13 04:40:13,434 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-13 04:40:13,736 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-13 04:40:16,686 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-10-13 04:40:16,978 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-13 04:40:18,627 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 16 [2020-10-13 04:40:19,023 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2020-10-13 04:40:23,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:23,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:23,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:23,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:23,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:23,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:23,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:23,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:40:23,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858825173] [2020-10-13 04:40:23,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:23,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-13 04:40:23,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231735654] [2020-10-13 04:40:23,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-13 04:40:23,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-13 04:40:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=7275, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 04:40:23,841 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand 88 states. [2020-10-13 04:40:25,757 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-13 04:40:27,515 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-13 04:40:28,816 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2020-10-13 04:40:30,228 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-13 04:40:30,954 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-13 04:40:31,323 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-13 04:40:31,749 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 04:40:33,276 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 80 [2020-10-13 04:40:34,523 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-13 04:40:35,803 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-13 04:40:37,273 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 79 [2020-10-13 04:40:37,882 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-13 04:40:38,644 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-10-13 04:40:39,078 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 04:40:39,761 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-13 04:40:40,549 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-13 04:40:41,511 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-10-13 04:40:41,934 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 26 [2020-10-13 04:40:42,495 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 46 [2020-10-13 04:40:42,963 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 21 [2020-10-13 04:40:43,552 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46 [2020-10-13 04:40:44,629 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 86 [2020-10-13 04:40:45,364 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-13 04:40:46,074 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 68 [2020-10-13 04:40:46,785 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 79 [2020-10-13 04:40:47,382 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2020-10-13 04:40:48,117 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-13 04:40:48,618 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-10-13 04:40:49,294 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-13 04:40:50,348 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-13 04:41:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:02,749 INFO L93 Difference]: Finished difference Result 312 states and 351 transitions. [2020-10-13 04:41:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 04:41:02,752 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 142 [2020-10-13 04:41:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:02,758 INFO L225 Difference]: With dead ends: 312 [2020-10-13 04:41:02,758 INFO L226 Difference]: Without dead ends: 306 [2020-10-13 04:41:02,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 4 SyntacticMatches, 21 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=1268, Invalid=21382, Unknown=0, NotChecked=0, Total=22650 [2020-10-13 04:41:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-13 04:41:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 284. [2020-10-13 04:41:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 04:41:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 318 transitions. [2020-10-13 04:41:02,788 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 318 transitions. Word has length 142 [2020-10-13 04:41:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:02,788 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 318 transitions. [2020-10-13 04:41:02,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-13 04:41:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 318 transitions. [2020-10-13 04:41:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 04:41:02,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:02,790 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:02,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:41:02,791 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1165447091, now seen corresponding path program 12 times [2020-10-13 04:41:02,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:02,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381766818] [2020-10-13 04:41:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:02,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:02,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:02,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:03,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:07,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:07,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 04:41:07,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:41:07,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:41:07,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:41:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:08,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:08,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:08,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:08,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:41:08,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:41:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381766818] [2020-10-13 04:41:08,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:08,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:08,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781113459] [2020-10-13 04:41:08,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:08,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:08,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:08,240 INFO L87 Difference]: Start difference. First operand 284 states and 318 transitions. Second operand 16 states. [2020-10-13 04:41:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:10,890 INFO L93 Difference]: Finished difference Result 615 states and 681 transitions. [2020-10-13 04:41:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:41:10,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 144 [2020-10-13 04:41:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:10,895 INFO L225 Difference]: With dead ends: 615 [2020-10-13 04:41:10,895 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 04:41:10,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:41:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 04:41:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 259. [2020-10-13 04:41:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 04:41:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 277 transitions. [2020-10-13 04:41:10,921 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 277 transitions. Word has length 144 [2020-10-13 04:41:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:10,922 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 277 transitions. [2020-10-13 04:41:10,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 277 transitions. [2020-10-13 04:41:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 04:41:10,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:10,924 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:10,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:41:10,925 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash -306872367, now seen corresponding path program 13 times [2020-10-13 04:41:10,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:10,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836754472] [2020-10-13 04:41:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:15,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:15,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:41:15,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:16,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:16,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:16,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:16,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:16,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:16,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:16,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-13 04:41:16,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836754472] [2020-10-13 04:41:16,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:16,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:16,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226293506] [2020-10-13 04:41:16,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:16,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:16,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:16,291 INFO L87 Difference]: Start difference. First operand 259 states and 277 transitions. Second operand 16 states. [2020-10-13 04:41:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:18,474 INFO L93 Difference]: Finished difference Result 266 states and 284 transitions. [2020-10-13 04:41:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:41:18,476 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 146 [2020-10-13 04:41:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:18,478 INFO L225 Difference]: With dead ends: 266 [2020-10-13 04:41:18,478 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 04:41:18,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:41:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 04:41:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-13 04:41:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 04:41:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2020-10-13 04:41:18,494 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2020-10-13 04:41:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:18,494 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2020-10-13 04:41:18,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2020-10-13 04:41:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 04:41:18,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:18,496 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:18,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:41:18,497 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2135980511, now seen corresponding path program 14 times [2020-10-13 04:41:18,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:18,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139345731] [2020-10-13 04:41:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:24,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:24,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 04:41:24,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:24,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5521 [2020-10-13 04:41:24,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 127 [2020-10-13 04:41:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:24,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-13 04:41:24,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:25,790 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-13 04:41:25,982 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-13 04:41:27,932 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-13 04:41:28,685 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 04:41:28,996 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-13 04:41:29,282 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-13 04:41:29,580 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-13 04:41:29,886 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-13 04:41:30,169 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-13 04:41:30,463 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-13 04:41:30,746 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 04:41:31,053 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 04:41:31,885 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-13 04:41:32,230 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-13 04:41:32,575 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-13 04:41:32,928 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-13 04:41:34,649 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45