/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:51:29,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:51:29,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:51:29,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:51:29,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:51:29,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:51:29,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:51:29,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:51:29,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:51:29,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:51:29,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:51:29,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:51:29,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:51:29,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:51:29,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:51:29,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:51:29,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:51:29,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:51:29,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:51:29,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:51:29,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:51:29,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:51:29,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:51:29,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:51:29,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:51:29,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:51:29,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:51:29,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:51:29,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:51:29,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:51:29,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:51:29,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:51:29,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:51:29,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:51:29,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:51:29,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:51:29,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:51:29,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:51:29,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:51:29,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:51:29,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:51:29,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 23:51:29,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:51:29,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:51:29,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:51:29,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:51:29,597 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:51:29,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:51:29,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:51:29,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:51:29,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:51:29,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:51:29,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:51:29,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:51:29,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:51:29,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:51:29,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:51:29,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:51:29,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:51:29,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:51:29,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:51:29,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:51:29,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:51:29,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:51:29,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:51:29,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:51:29,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:51:29,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:51:29,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:51:29,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:51:29,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:51:29,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-24 23:51:30,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:51:30,091 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:51:30,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:51:30,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:51:30,098 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:51:30,099 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 23:51:30,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c3afd8c6/b4c3de1563ee4d39bfcf213cfa6ccd3f/FLAG62ca2bf19 [2020-09-24 23:51:30,796 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:51:30,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 23:51:30,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c3afd8c6/b4c3de1563ee4d39bfcf213cfa6ccd3f/FLAG62ca2bf19 [2020-09-24 23:51:31,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c3afd8c6/b4c3de1563ee4d39bfcf213cfa6ccd3f [2020-09-24 23:51:31,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:51:31,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:51:31,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:31,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:51:31,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:51:31,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dbf213c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31, skipping insertion in model container [2020-09-24 23:51:31,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:51:31,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:51:31,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:31,459 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:51:31,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:31,581 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:51:31,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31 WrapperNode [2020-09-24 23:51:31,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:31,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:51:31,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:51:31,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:51:31,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... [2020-09-24 23:51:31,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:51:31,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:51:31,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:51:31,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:51:31,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:51:31,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:51:31,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:51:31,722 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 23:51:31,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:51:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:51:31,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:51:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 23:51:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:51:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:51:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 23:51:31,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:51:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:51:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:51:31,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:51:32,086 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:51:32,086 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 23:51:32,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:32 BoogieIcfgContainer [2020-09-24 23:51:32,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:51:32,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:51:32,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:51:32,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:51:32,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:51:31" (1/3) ... [2020-09-24 23:51:32,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad192f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:32, skipping insertion in model container [2020-09-24 23:51:32,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:31" (2/3) ... [2020-09-24 23:51:32,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad192f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:32, skipping insertion in model container [2020-09-24 23:51:32,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:32" (3/3) ... [2020-09-24 23:51:32,103 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-24 23:51:32,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:51:32,126 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:51:32,148 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:51:32,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:51:32,177 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:51:32,178 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:51:32,178 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:51:32,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:51:32,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:51:32,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:51:32,178 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:51:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-24 23:51:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 23:51:32,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:32,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:32,212 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-24 23:51:32,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:32,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162112448] [2020-09-24 23:51:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:32,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 23:51:32,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:51:32,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-24 23:51:32,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 23:51:32,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:51:32,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:32,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:32,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:32,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 23:51:32,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:32,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:32,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 23:51:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:32,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:32,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:32,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:32,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 23:51:32,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:32,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:32,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:32,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:32,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:32,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162112448] [2020-09-24 23:51:32,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:51:32,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 23:51:32,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265102845] [2020-09-24 23:51:32,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 23:51:32,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 23:51:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 23:51:32,799 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-24 23:51:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:32,970 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-24 23:51:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 23:51:32,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 23:51:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:32,988 INFO L225 Difference]: With dead ends: 102 [2020-09-24 23:51:32,989 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 23:51:32,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 23:51:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 23:51:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-24 23:51:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 23:51:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-24 23:51:33,042 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-24 23:51:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:33,043 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-24 23:51:33,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 23:51:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-24 23:51:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 23:51:33,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:33,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:33,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:51:33,046 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-24 23:51:33,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:33,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772753056] [2020-09-24 23:51:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 23:51:33,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-24 23:51:33,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 23:51:33,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:33,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 23:51:33,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 23:51:33,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:33,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:51:33,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:33,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:33,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:33,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 23:51:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:33,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 23:51:33,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:33,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:33,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:33,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:33,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772753056] [2020-09-24 23:51:33,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:51:33,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 23:51:33,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381854318] [2020-09-24 23:51:33,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 23:51:33,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 23:51:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 23:51:33,301 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-24 23:51:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:33,494 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-24 23:51:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 23:51:33,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-24 23:51:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:33,497 INFO L225 Difference]: With dead ends: 92 [2020-09-24 23:51:33,498 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 23:51:33,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 23:51:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 23:51:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-24 23:51:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 23:51:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-24 23:51:33,513 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-24 23:51:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:33,513 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-24 23:51:33,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 23:51:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-24 23:51:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 23:51:33,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:33,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:33,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:51:33,516 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-24 23:51:33,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:33,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629658406] [2020-09-24 23:51:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 23:51:33,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-24 23:51:33,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:51:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:51:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:33,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:33,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:33,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:33,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 23:51:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:33,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:33,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:33,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:33,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:51:33,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:33,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:33,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:33,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:33,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:33,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629658406] [2020-09-24 23:51:33,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:33,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 23:51:33,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269666573] [2020-09-24 23:51:33,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 23:51:33,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 23:51:33,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 23:51:33,808 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-24 23:51:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:33,954 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-24 23:51:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 23:51:33,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-24 23:51:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:33,956 INFO L225 Difference]: With dead ends: 102 [2020-09-24 23:51:33,957 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 23:51:33,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:51:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 23:51:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-24 23:51:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 23:51:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-24 23:51:33,968 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-24 23:51:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:33,968 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-24 23:51:33,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 23:51:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-24 23:51:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 23:51:33,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:33,971 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:33,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:51:33,971 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:33,972 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-24 23:51:33,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:33,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382946899] [2020-09-24 23:51:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:34,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:34,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 23:51:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-09-24 23:51:34,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:51:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:34,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 23:51:34,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 23:51:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:34,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:34,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:34,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:34,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:34,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:34,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:34,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:34,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 23:51:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:34,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:34,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:34,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:34,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 23:51:34,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:34,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:34,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382946899] [2020-09-24 23:51:34,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:34,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 23:51:34,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677840346] [2020-09-24 23:51:34,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 23:51:34,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 23:51:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:51:34,477 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-24 23:51:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:34,713 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-24 23:51:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 23:51:34,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-24 23:51:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:34,717 INFO L225 Difference]: With dead ends: 112 [2020-09-24 23:51:34,717 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 23:51:34,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 23:51:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 23:51:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-24 23:51:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 23:51:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-24 23:51:34,738 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-24 23:51:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:34,741 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-24 23:51:34,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 23:51:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-24 23:51:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 23:51:34,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:34,759 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:34,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:51:34,760 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-24 23:51:34,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:34,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665086855] [2020-09-24 23:51:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:34,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:35,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 23:51:35,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:35,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-24 23:51:35,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:35,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:51:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 23:51:35,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:35,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:35,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:35,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:35,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:35,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:35,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:35,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 23:51:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:35,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:35,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:35,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:35,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:51:35,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:35,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:35,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:35,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:35,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:35,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665086855] [2020-09-24 23:51:35,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:35,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 23:51:35,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859328826] [2020-09-24 23:51:35,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 23:51:35,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 23:51:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 23:51:35,252 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-24 23:51:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:35,438 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-24 23:51:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 23:51:35,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 23:51:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:35,440 INFO L225 Difference]: With dead ends: 122 [2020-09-24 23:51:35,441 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 23:51:35,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 23:51:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 23:51:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-24 23:51:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 23:51:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-24 23:51:35,449 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-24 23:51:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:35,450 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-24 23:51:35,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 23:51:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-24 23:51:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 23:51:35,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:35,452 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:35,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 23:51:35,452 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-24 23:51:35,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:35,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280112462] [2020-09-24 23:51:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:35,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:35,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:35,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 23:51:35,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-09-24 23:51:35,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 23:51:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 23:51:35,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:36,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:36,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:36,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:36,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:36,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:36,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:36,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:36,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 23:51:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:36,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:36,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:36,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 23:51:36,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:36,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:36,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280112462] [2020-09-24 23:51:36,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:36,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 23:51:36,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29540784] [2020-09-24 23:51:36,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 23:51:36,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 23:51:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 23:51:36,079 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-24 23:51:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:36,313 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-24 23:51:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 23:51:36,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-24 23:51:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:36,316 INFO L225 Difference]: With dead ends: 132 [2020-09-24 23:51:36,319 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 23:51:36,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 23:51:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 23:51:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-24 23:51:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 23:51:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-24 23:51:36,330 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-24 23:51:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:36,330 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-24 23:51:36,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 23:51:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-24 23:51:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 23:51:36,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:36,332 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:36,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 23:51:36,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-24 23:51:36,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:36,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401379802] [2020-09-24 23:51:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:36,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:37,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 23:51:37,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:37,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-09-24 23:51:37,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 23:51:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:37,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 23:51:37,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:37,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:37,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:37,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:37,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:37,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:37,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:37,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:37,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:37,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:37,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 23:51:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:37,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:37,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:37,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:37,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:37,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:37,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:37,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:37,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401379802] [2020-09-24 23:51:37,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:37,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 23:51:37,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075646802] [2020-09-24 23:51:37,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 23:51:37,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 23:51:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 23:51:37,224 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-24 23:51:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:37,539 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-24 23:51:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 23:51:37,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-24 23:51:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:37,541 INFO L225 Difference]: With dead ends: 142 [2020-09-24 23:51:37,541 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 23:51:37,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 23:51:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 23:51:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-24 23:51:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 23:51:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-24 23:51:37,550 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-24 23:51:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:37,551 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-24 23:51:37,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 23:51:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-24 23:51:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-24 23:51:37,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:37,553 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:37,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 23:51:37,553 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-24 23:51:37,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:37,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174797119] [2020-09-24 23:51:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:37,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:38,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:38,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 23:51:38,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:38,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-09-24 23:51:38,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 23:51:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:38,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 23:51:38,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:38,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:38,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:38,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:38,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:38,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:51:38,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:38,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:38,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:38,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 23:51:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:38,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:38,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:38,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:38,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 23:51:38,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:38,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:38,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:38,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:38,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174797119] [2020-09-24 23:51:38,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:38,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 23:51:38,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067016473] [2020-09-24 23:51:38,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 23:51:38,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:38,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 23:51:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 23:51:38,582 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-24 23:51:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:39,077 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-24 23:51:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 23:51:39,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-24 23:51:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:39,080 INFO L225 Difference]: With dead ends: 152 [2020-09-24 23:51:39,080 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 23:51:39,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 23:51:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 23:51:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-24 23:51:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 23:51:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-24 23:51:39,100 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-24 23:51:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:39,101 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-24 23:51:39,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 23:51:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-24 23:51:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 23:51:39,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:39,105 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:39,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 23:51:39,106 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-24 23:51:39,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:39,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256306517] [2020-09-24 23:51:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:39,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:40,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:40,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 23:51:40,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:40,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-09-24 23:51:40,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 23:51:40,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:40,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 23:51:40,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:40,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:40,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:40,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 23:51:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:40,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:40,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:40,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:40,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:51:40,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:40,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:40,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:40,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:40,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:40,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256306517] [2020-09-24 23:51:40,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:40,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 23:51:40,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235601059] [2020-09-24 23:51:40,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 23:51:40,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 23:51:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 23:51:40,357 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-24 23:51:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:40,820 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-24 23:51:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 23:51:40,821 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-24 23:51:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:40,823 INFO L225 Difference]: With dead ends: 162 [2020-09-24 23:51:40,823 INFO L226 Difference]: Without dead ends: 132 [2020-09-24 23:51:40,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 23:51:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-24 23:51:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-24 23:51:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 23:51:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-24 23:51:40,829 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-24 23:51:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:40,830 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-24 23:51:40,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 23:51:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-24 23:51:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 23:51:40,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:40,832 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:40,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 23:51:40,832 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-24 23:51:40,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:40,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099448881] [2020-09-24 23:51:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:40,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-24 23:51:41,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:41,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-09-24 23:51:41,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 23:51:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 23:51:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:42,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:42,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:42,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:42,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:42,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:42,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:42,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:42,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:42,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:42,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:42,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 23:51:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:42,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:42,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:42,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:42,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:42,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:42,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:42,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099448881] [2020-09-24 23:51:42,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:42,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 23:51:42,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413917578] [2020-09-24 23:51:42,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 23:51:42,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 23:51:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 23:51:42,272 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-24 23:51:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:42,756 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-24 23:51:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 23:51:42,756 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-24 23:51:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:42,758 INFO L225 Difference]: With dead ends: 172 [2020-09-24 23:51:42,758 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 23:51:42,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 23:51:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 23:51:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-24 23:51:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 23:51:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-24 23:51:42,765 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-24 23:51:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:42,765 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-24 23:51:42,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 23:51:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-24 23:51:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 23:51:42,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:42,767 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:42,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 23:51:42,768 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-24 23:51:42,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:42,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225422783] [2020-09-24 23:51:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:44,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:44,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-24 23:51:44,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:44,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-09-24 23:51:44,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 23:51:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 23:51:44,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:44,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:44,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:44,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:44,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:44,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:51:44,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:44,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:44,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 23:51:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:44,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:44,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:44,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:44,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:44,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:44,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:44,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225422783] [2020-09-24 23:51:44,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:44,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 23:51:44,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820537449] [2020-09-24 23:51:44,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 23:51:44,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 23:51:44,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 23:51:44,453 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-24 23:51:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:45,041 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-24 23:51:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 23:51:45,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-24 23:51:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:45,044 INFO L225 Difference]: With dead ends: 182 [2020-09-24 23:51:45,044 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 23:51:45,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 23:51:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 23:51:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-24 23:51:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 23:51:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-24 23:51:45,051 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-24 23:51:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:45,051 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-24 23:51:45,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 23:51:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-24 23:51:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 23:51:45,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:45,070 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:45,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 23:51:45,071 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-24 23:51:45,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:45,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016709849] [2020-09-24 23:51:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:46,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:46,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 23:51:46,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:46,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1539 [2020-09-24 23:51:46,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 23:51:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:46,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 23:51:46,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:47,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:47,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:47,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:47,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:47,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:47,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 23:51:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:47,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:47,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:47,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:47,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:47,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:47,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016709849] [2020-09-24 23:51:47,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:47,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 23:51:47,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796662181] [2020-09-24 23:51:47,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 23:51:47,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:47,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 23:51:47,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 23:51:47,045 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-24 23:51:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:47,760 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-24 23:51:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 23:51:47,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-24 23:51:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:47,762 INFO L225 Difference]: With dead ends: 192 [2020-09-24 23:51:47,762 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 23:51:47,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 23:51:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 23:51:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-24 23:51:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 23:51:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-24 23:51:47,768 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-24 23:51:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:47,768 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-24 23:51:47,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 23:51:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-24 23:51:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 23:51:47,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:47,770 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:47,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 23:51:47,771 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-24 23:51:47,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:47,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867101220] [2020-09-24 23:51:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:49,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:49,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 23:51:49,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:49,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-09-24 23:51:49,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:49,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 23:51:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-24 23:51:49,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:49,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:49,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:49,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:49,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:49,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:49,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:49,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:49,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:49,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:49,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 23:51:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:49,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:49,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:49,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:49,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:49,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:49,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:49,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:49,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:49,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:50,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867101220] [2020-09-24 23:51:50,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:50,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 23:51:50,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018809085] [2020-09-24 23:51:50,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 23:51:50,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 23:51:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 23:51:50,008 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-24 23:51:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:50,767 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-24 23:51:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 23:51:50,768 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-24 23:51:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:50,769 INFO L225 Difference]: With dead ends: 202 [2020-09-24 23:51:50,769 INFO L226 Difference]: Without dead ends: 172 [2020-09-24 23:51:50,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 23:51:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-24 23:51:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-24 23:51:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 23:51:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-24 23:51:50,781 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-24 23:51:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:50,781 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-24 23:51:50,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 23:51:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-24 23:51:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 23:51:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:50,784 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:50,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 23:51:50,785 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-24 23:51:50,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:50,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635913686] [2020-09-24 23:51:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:50,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:52,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:52,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 23:51:52,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:52,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-09-24 23:51:52,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:52,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 23:51:52,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 23:51:52,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:53,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:53,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:53,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:53,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:53,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:51:53,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:53,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:53,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 23:51:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:53,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:53,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:53,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:53,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:51:53,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:53,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:53,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635913686] [2020-09-24 23:51:53,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:53,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 23:51:53,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023869048] [2020-09-24 23:51:53,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 23:51:53,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 23:51:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 23:51:53,286 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-24 23:51:54,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:54,244 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-24 23:51:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 23:51:54,245 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-24 23:51:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:54,246 INFO L225 Difference]: With dead ends: 212 [2020-09-24 23:51:54,246 INFO L226 Difference]: Without dead ends: 182 [2020-09-24 23:51:54,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 23:51:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-24 23:51:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-24 23:51:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-24 23:51:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-24 23:51:54,253 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-24 23:51:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:54,253 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-24 23:51:54,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 23:51:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-24 23:51:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 23:51:54,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:54,255 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:54,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 23:51:54,256 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-24 23:51:54,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:54,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570193950] [2020-09-24 23:51:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:56,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:56,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-24 23:51:56,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-09-24 23:51:56,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 23:51:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:51:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-24 23:51:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:56,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:56,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:56,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:51:56,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:56,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:51:56,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:56,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:56,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-24 23:51:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:56,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:56,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:51:56,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:56,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:51:56,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:56,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:51:56,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:51:56,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:51:56,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:51:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:56,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570193950] [2020-09-24 23:51:56,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:51:56,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 23:51:56,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716311190] [2020-09-24 23:51:56,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 23:51:56,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 23:51:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 23:51:56,932 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-24 23:51:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:58,027 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-24 23:51:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 23:51:58,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-24 23:51:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:58,030 INFO L225 Difference]: With dead ends: 222 [2020-09-24 23:51:58,030 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 23:51:58,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 23:51:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 23:51:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-24 23:51:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-24 23:51:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-24 23:51:58,037 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-24 23:51:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:58,038 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-24 23:51:58,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 23:51:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-24 23:51:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 23:51:58,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:58,040 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:58,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 23:51:58,040 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:58,041 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-24 23:51:58,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:58,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437509869] [2020-09-24 23:51:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:58,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:00,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:00,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 23:52:00,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:00,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2647 [2020-09-24 23:52:00,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 23:52:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:52:00,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 23:52:00,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:01,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:01,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:01,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 23:52:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:01,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:01,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:01,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:52:01,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:01,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:01,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:01,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:01,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437509869] [2020-09-24 23:52:01,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:01,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 23:52:01,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590157606] [2020-09-24 23:52:01,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 23:52:01,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 23:52:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 23:52:01,372 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-24 23:52:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:02,474 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-24 23:52:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 23:52:02,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-24 23:52:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:02,477 INFO L225 Difference]: With dead ends: 232 [2020-09-24 23:52:02,477 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 23:52:02,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 23:52:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 23:52:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-24 23:52:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 23:52:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-24 23:52:02,487 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-24 23:52:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:02,488 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-24 23:52:02,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 23:52:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-24 23:52:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-24 23:52:02,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:02,489 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:02,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 23:52:02,490 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-24 23:52:02,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:02,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795956103] [2020-09-24 23:52:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:02,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:05,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:05,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-24 23:52:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:05,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2569 [2020-09-24 23:52:05,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 23:52:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:52:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-24 23:52:05,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:05,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:05,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-24 23:52:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:05,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:05,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:05,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:05,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:05,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:52:05,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:05,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795956103] [2020-09-24 23:52:05,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:05,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 23:52:05,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944746461] [2020-09-24 23:52:05,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 23:52:05,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 23:52:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 23:52:05,791 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-24 23:52:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:07,000 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-24 23:52:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 23:52:07,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-24 23:52:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:07,003 INFO L225 Difference]: With dead ends: 242 [2020-09-24 23:52:07,003 INFO L226 Difference]: Without dead ends: 212 [2020-09-24 23:52:07,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 23:52:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-24 23:52:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-24 23:52:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 23:52:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-24 23:52:07,013 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-24 23:52:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:07,013 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-24 23:52:07,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 23:52:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-24 23:52:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-24 23:52:07,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:07,015 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:07,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 23:52:07,016 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-24 23:52:07,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:07,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532843563] [2020-09-24 23:52:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:07,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:09,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:09,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-24 23:52:09,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:09,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2759 [2020-09-24 23:52:09,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:09,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 23:52:09,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:52:09,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-24 23:52:09,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:10,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:10,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:10,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:10,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:10,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:52:10,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:10,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:10,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:10,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:10,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:10,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 23:52:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:10,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:10,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:10,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:10,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:10,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 23:52:10,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:10,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:10,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:10,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:10,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:10,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532843563] [2020-09-24 23:52:10,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:10,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 23:52:10,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119243422] [2020-09-24 23:52:10,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 23:52:10,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 23:52:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 23:52:10,560 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-24 23:52:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:11,917 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-24 23:52:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 23:52:11,918 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-24 23:52:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:11,919 INFO L225 Difference]: With dead ends: 252 [2020-09-24 23:52:11,920 INFO L226 Difference]: Without dead ends: 222 [2020-09-24 23:52:11,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-24 23:52:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-24 23:52:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-24 23:52:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-24 23:52:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-24 23:52:11,929 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-24 23:52:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:11,930 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-24 23:52:11,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 23:52:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-24 23:52:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-24 23:52:11,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:11,931 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:11,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 23:52:11,932 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:11,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-24 23:52:11,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:11,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764002151] [2020-09-24 23:52:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:11,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:15,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:15,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-24 23:52:15,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3087 [2020-09-24 23:52:15,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 23:52:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:52:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-24 23:52:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:15,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:15,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:15,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:15,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 23:52:15,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:15,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:15,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-24 23:52:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:15,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:15,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:15,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:15,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:52:15,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:15,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:15,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:15,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:15,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764002151] [2020-09-24 23:52:15,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:15,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 23:52:15,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216101242] [2020-09-24 23:52:15,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 23:52:15,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:15,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 23:52:15,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 23:52:15,890 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-24 23:52:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:52:17,442 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-24 23:52:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 23:52:17,442 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-24 23:52:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:52:17,445 INFO L225 Difference]: With dead ends: 262 [2020-09-24 23:52:17,445 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 23:52:17,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 23:52:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 23:52:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-24 23:52:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-24 23:52:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-24 23:52:17,457 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-24 23:52:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:52:17,457 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-24 23:52:17,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 23:52:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-24 23:52:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-24 23:52:17,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:52:17,459 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:52:17,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 23:52:17,459 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:52:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:52:17,460 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-24 23:52:17,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:52:17,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193227255] [2020-09-24 23:52:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:52:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:17,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:21,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:21,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-09-24 23:52:21,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:21,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3623 [2020-09-24 23:52:21,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:21,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 23:52:21,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:52:21,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-09-24 23:52:21,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:52:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:52:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:22,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:22,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:22,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:52:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:22,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 23:52:22,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:22,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:52:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:22,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-09-24 23:52:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:52:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:52:22,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:52:22,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:52:22,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:52:22,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 23:52:22,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:52:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:52:22,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:52:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:52:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:52:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 1548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:52:22,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193227255] [2020-09-24 23:52:22,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:52:22,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-24 23:52:22,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59588263] [2020-09-24 23:52:22,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-24 23:52:22,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:52:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-24 23:52:22,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 23:52:22,169 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states.