/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:23:09,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:23:09,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:23:09,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:23:09,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:23:09,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:23:09,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:23:09,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:23:09,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:23:09,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:23:09,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:23:09,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:23:09,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:23:09,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:23:09,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:23:09,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:23:09,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:23:09,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:23:09,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:23:09,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:23:09,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:23:09,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:23:09,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:23:09,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:23:09,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:23:09,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:23:09,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:23:09,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:23:09,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:23:09,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:23:09,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:23:09,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:23:09,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:23:09,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:23:09,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:23:09,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:23:09,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:23:09,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:23:09,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:23:09,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:23:09,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:23:09,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:23:09,527 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:23:09,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:23:09,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:23:09,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:23:09,530 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:23:09,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:23:09,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:23:09,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:23:09,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:23:09,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:23:09,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:23:09,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:23:09,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:23:09,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:23:09,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:23:09,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:23:09,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:23:09,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:23:09,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:23:09,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:23:09,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:23:09,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:23:09,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:23:09,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:23:09,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:23:09,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:23:09,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:23:09,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:23:09,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:23:09,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:23:09,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:23:09,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:23:09,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:23:09,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:23:09,901 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:23:09,902 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2020-10-13 23:23:09,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bbfe133e/04481551d88445a480c8c3998a07e32b/FLAG391946701 [2020-10-13 23:23:10,459 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:23:10,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2020-10-13 23:23:10,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bbfe133e/04481551d88445a480c8c3998a07e32b/FLAG391946701 [2020-10-13 23:23:10,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bbfe133e/04481551d88445a480c8c3998a07e32b [2020-10-13 23:23:10,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:23:10,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:23:10,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:23:10,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:23:10,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:23:10,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:23:10" (1/1) ... [2020-10-13 23:23:10,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:10, skipping insertion in model container [2020-10-13 23:23:10,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:23:10" (1/1) ... [2020-10-13 23:23:10,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:23:10,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:23:11,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:23:11,047 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:23:11,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:23:11,091 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:23:11,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11 WrapperNode [2020-10-13 23:23:11,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:23:11,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:23:11,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:23:11,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:23:11,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... [2020-10-13 23:23:11,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:23:11,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:23:11,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:23:11,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:23:11,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:23:11,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:23:11,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:23:11,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:23:11,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:23:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:23:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:23:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:23:11,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:23:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:23:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:23:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:23:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:23:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:23:11,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:23:11,621 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:23:11,621 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:23:11,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:23:11 BoogieIcfgContainer [2020-10-13 23:23:11,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:23:11,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:23:11,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:23:11,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:23:11,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:23:10" (1/3) ... [2020-10-13 23:23:11,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553ef119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:23:11, skipping insertion in model container [2020-10-13 23:23:11,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:23:11" (2/3) ... [2020-10-13 23:23:11,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553ef119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:23:11, skipping insertion in model container [2020-10-13 23:23:11,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:23:11" (3/3) ... [2020-10-13 23:23:11,635 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2020-10-13 23:23:11,646 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:23:11,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:23:11,667 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:23:11,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:23:11,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:23:11,689 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:23:11,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:23:11,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:23:11,689 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:23:11,689 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:23:11,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:23:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-13 23:23:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:23:11,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:11,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:11,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:11,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1746448729, now seen corresponding path program 1 times [2020-10-13 23:23:11,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:11,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474476097] [2020-10-13 23:23:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:12,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:23:12,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:12,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-13 23:23:12,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:12,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:12,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:23:12,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:12,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 23:23:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:12,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:12,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:12,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:12,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:23:12,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:12,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:12,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:12,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474476097] [2020-10-13 23:23:12,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:12,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:23:12,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504777874] [2020-10-13 23:23:12,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:23:12,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:23:12,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:23:12,252 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-13 23:23:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:12,353 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2020-10-13 23:23:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:23:12,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 23:23:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:12,364 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:23:12,364 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:23:12,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:23:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:23:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:23:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:23:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 23:23:12,407 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-13 23:23:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:12,407 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 23:23:12,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:23:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 23:23:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:23:12,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:12,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:12,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:23:12,410 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash 934485258, now seen corresponding path program 1 times [2020-10-13 23:23:12,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:12,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125445249] [2020-10-13 23:23:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:12,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:12,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:23:12,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:12,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-13 23:23:12,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:12,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:12,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:12,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:23:12,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:12,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:12,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:12,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:12,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:23:12,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:12,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:12,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:12,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:12,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125445249] [2020-10-13 23:23:12,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:12,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:23:12,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998449378] [2020-10-13 23:23:12,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:23:12,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:23:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:12,719 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-13 23:23:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:12,813 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-13 23:23:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:23:12,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:23:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:12,814 INFO L225 Difference]: With dead ends: 43 [2020-10-13 23:23:12,814 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:23:12,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:23:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:23:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:23:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 23:23:12,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-10-13 23:23:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:12,824 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 23:23:12,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:23:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 23:23:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:23:12,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:12,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:12,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:23:12,826 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:12,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1806235348, now seen corresponding path program 1 times [2020-10-13 23:23:12,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:12,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48918382] [2020-10-13 23:23:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:12,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:12,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:23:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-13 23:23:13,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:13,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:13,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:23:13,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:13,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:13,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:13,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:13,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:13,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:13,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:13,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:13,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48918382] [2020-10-13 23:23:13,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:13,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:23:13,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346897100] [2020-10-13 23:23:13,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:23:13,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:23:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:13,141 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-13 23:23:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:13,247 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 23:23:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:23:13,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 23:23:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:13,249 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:23:13,249 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:23:13,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:23:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 23:23:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:23:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 23:23:13,262 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-13 23:23:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:13,263 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 23:23:13,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:23:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 23:23:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:23:13,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:13,265 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] [2020-10-13 23:23:13,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:23:13,266 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1568565518, now seen corresponding path program 1 times [2020-10-13 23:23:13,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:13,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616292878] [2020-10-13 23:23:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:13,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:13,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:23:13,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:13,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-13 23:23:13,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:13,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:13,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:23:13,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:23:13,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:23:13,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:13,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:13,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:13,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:13,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:13,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:13,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616292878] [2020-10-13 23:23:13,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:13,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:23:13,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186212129] [2020-10-13 23:23:13,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:13,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:13,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:13,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:13,921 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-10-13 23:23:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:14,045 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-13 23:23:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:14,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:23:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:14,047 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:23:14,047 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:23:14,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:23:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-13 23:23:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:23:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 23:23:14,055 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2020-10-13 23:23:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:14,055 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 23:23:14,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 23:23:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:23:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:14,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:14,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:23:14,057 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1649894043, now seen corresponding path program 1 times [2020-10-13 23:23:14,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:14,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245022108] [2020-10-13 23:23:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:23:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-13 23:23:14,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:23:14,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:14,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:14,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:14,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:23:14,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245022108] [2020-10-13 23:23:14,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:14,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:23:14,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236865219] [2020-10-13 23:23:14,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:23:14,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:23:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:14,783 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-13 23:23:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:14,865 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-13 23:23:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:23:14,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 23:23:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:14,867 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:23:14,867 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:23:14,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:23:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 23:23:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:23:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-13 23:23:14,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2020-10-13 23:23:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:14,875 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-13 23:23:14,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:23:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-13 23:23:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:23:14,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:14,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:14,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:23:14,877 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:14,877 INFO L82 PathProgramCache]: Analyzing trace with hash 317446851, now seen corresponding path program 2 times [2020-10-13 23:23:14,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:14,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059288119] [2020-10-13 23:23:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:14,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:15,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:23:15,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-10-13 23:23:15,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:15,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:23:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:15,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:15,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:15,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:15,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:15,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:15,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:15,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:15,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:23:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059288119] [2020-10-13 23:23:15,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:15,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:23:15,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933584824] [2020-10-13 23:23:15,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:15,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:15,954 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-13 23:23:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:16,036 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-13 23:23:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:23:16,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 23:23:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:16,037 INFO L225 Difference]: With dead ends: 58 [2020-10-13 23:23:16,038 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:23:16,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:23:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 23:23:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:23:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 23:23:16,044 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 27 [2020-10-13 23:23:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:16,045 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 23:23:16,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 23:23:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:23:16,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:16,046 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:16,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:23:16,046 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1146435745, now seen corresponding path program 3 times [2020-10-13 23:23:16,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:16,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913417600] [2020-10-13 23:23:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:16,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:18,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:23:18,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2693 [2020-10-13 23:23:18,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:18,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:18,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:18,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:18,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:23:18,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:18,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:18,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:18,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:18,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:18,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:18,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:18,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913417600] [2020-10-13 23:23:18,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:18,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:23:18,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210937621] [2020-10-13 23:23:18,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:23:18,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:18,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:23:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:18,814 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-13 23:23:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:19,008 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-13 23:23:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:23:19,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 23:23:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:19,011 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:23:19,012 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:23:19,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:23:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-13 23:23:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:23:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-13 23:23:19,024 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-13 23:23:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:19,024 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-13 23:23:19,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:23:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-13 23:23:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:23:19,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:19,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:19,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:23:19,026 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1887749727, now seen corresponding path program 1 times [2020-10-13 23:23:19,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:19,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470066097] [2020-10-13 23:23:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:19,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:23:21,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2556 [2020-10-13 23:23:21,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:21,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:23:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:21,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:21,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:21,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:21,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:21,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:21,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:21,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:21,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:21,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:21,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470066097] [2020-10-13 23:23:21,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:21,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:23:21,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731028967] [2020-10-13 23:23:21,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:21,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:21,685 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-10-13 23:23:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:21,942 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-13 23:23:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:21,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 23:23:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:21,944 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:23:21,945 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:23:21,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:23:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2020-10-13 23:23:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:23:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-13 23:23:21,959 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 31 [2020-10-13 23:23:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:21,960 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-13 23:23:21,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-13 23:23:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:23:21,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:21,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:21,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:23:21,965 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1653718798, now seen corresponding path program 4 times [2020-10-13 23:23:21,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:21,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369762042] [2020-10-13 23:23:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:21,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:22,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:23,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:23:23,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:23,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-10-13 23:23:23,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:23,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:23:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:23,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:23,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:23,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:23,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:23,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:23,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369762042] [2020-10-13 23:23:23,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:23,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:23:23,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756011795] [2020-10-13 23:23:23,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:23,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:23,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:23,505 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 8 states. [2020-10-13 23:23:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:23,741 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-10-13 23:23:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:23,742 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 23:23:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:23,743 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:23:23,743 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:23:23,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:23:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:23:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-10-13 23:23:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:23:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-13 23:23:23,752 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 32 [2020-10-13 23:23:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:23,752 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-13 23:23:23,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-13 23:23:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:23:23,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:23,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:23,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:23:23,754 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1325915293, now seen corresponding path program 2 times [2020-10-13 23:23:23,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:23,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430866977] [2020-10-13 23:23:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:25,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:27,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:23:27,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3250 [2020-10-13 23:23:27,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:27,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:23:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:27,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:23:27,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:27,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:27,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:27,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:27,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:27,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:27,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:27,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:23:27,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430866977] [2020-10-13 23:23:27,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:27,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:23:27,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898843822] [2020-10-13 23:23:27,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:23:27,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:23:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:27,072 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 7 states. [2020-10-13 23:23:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:27,172 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-10-13 23:23:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:23:27,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-13 23:23:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:27,174 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:23:27,174 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:23:27,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:23:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 23:23:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:23:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 23:23:27,185 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 33 [2020-10-13 23:23:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:27,185 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 23:23:27,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:23:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 23:23:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:23:27,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:27,188 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:27,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:23:27,189 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1864442885, now seen corresponding path program 3 times [2020-10-13 23:23:27,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:27,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519207607] [2020-10-13 23:23:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:30,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:30,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:23:30,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:30,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3378 [2020-10-13 23:23:30,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:30,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:23:30,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:23:30,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:30,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:30,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:30,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:30,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:30,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:30,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:30,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:30,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:30,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:23:30,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519207607] [2020-10-13 23:23:30,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:30,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:30,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24304855] [2020-10-13 23:23:30,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:30,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:30,710 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 9 states. [2020-10-13 23:23:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:31,133 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-13 23:23:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:23:31,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 23:23:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:31,135 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:23:31,135 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:23:31,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:23:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:23:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2020-10-13 23:23:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:23:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-13 23:23:31,149 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 35 [2020-10-13 23:23:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:31,152 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-13 23:23:31,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-13 23:23:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:23:31,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:31,155 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:31,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:23:31,156 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:31,156 INFO L82 PathProgramCache]: Analyzing trace with hash -528094510, now seen corresponding path program 4 times [2020-10-13 23:23:31,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:31,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828634951] [2020-10-13 23:23:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:31,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:34,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:23:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3359 [2020-10-13 23:23:34,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:34,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:34,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:23:34,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:34,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:34,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:34,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:34,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:34,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:34,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:34,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:34,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:34,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:34,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:23:34,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828634951] [2020-10-13 23:23:34,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:34,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:34,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125862248] [2020-10-13 23:23:34,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:34,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:34,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:34,614 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 9 states. [2020-10-13 23:23:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:34,954 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-13 23:23:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:23:34,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 23:23:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:34,956 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:23:34,956 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:23:34,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:23:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:23:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2020-10-13 23:23:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:23:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-13 23:23:34,971 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2020-10-13 23:23:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:34,971 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-13 23:23:34,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-13 23:23:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:23:34,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:34,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:34,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:23:34,974 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 764521183, now seen corresponding path program 5 times [2020-10-13 23:23:34,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:34,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693482657] [2020-10-13 23:23:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:34,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:36,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:23:36,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:36,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1873 [2020-10-13 23:23:36,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:36,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:23:36,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:36,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:36,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:36,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:36,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:36,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:36,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:36,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:36,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:23:36,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693482657] [2020-10-13 23:23:36,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:36,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:36,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201698586] [2020-10-13 23:23:36,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:36,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:36,953 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 9 states. [2020-10-13 23:23:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:37,252 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-13 23:23:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:23:37,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 23:23:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:37,253 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:23:37,254 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:23:37,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:23:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:23:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-10-13 23:23:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:23:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-13 23:23:37,272 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 37 [2020-10-13 23:23:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:37,272 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-13 23:23:37,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-13 23:23:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:23:37,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:37,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:37,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:23:37,274 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:37,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1053623495, now seen corresponding path program 5 times [2020-10-13 23:23:37,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:37,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620104076] [2020-10-13 23:23:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:40,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2955 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:23:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:40,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:40,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:40,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:40,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:40,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:40,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:40,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 23:23:40,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620104076] [2020-10-13 23:23:40,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:40,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:23:40,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974790157] [2020-10-13 23:23:40,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:40,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:40,293 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 8 states. [2020-10-13 23:23:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:40,388 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2020-10-13 23:23:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:40,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 23:23:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:40,390 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:23:40,390 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:23:40,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:23:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 23:23:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:23:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-13 23:23:40,396 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 37 [2020-10-13 23:23:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:40,397 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-13 23:23:40,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-13 23:23:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:23:40,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:40,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:40,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:23:40,398 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 916396951, now seen corresponding path program 6 times [2020-10-13 23:23:40,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:40,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023955956] [2020-10-13 23:23:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:40,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3027 [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:23:43,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:43,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:23:43,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:43,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:43,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:43,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:43,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:43,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:43,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:43,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:43,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:43,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:23:43,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023955956] [2020-10-13 23:23:43,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:43,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:43,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380562088] [2020-10-13 23:23:43,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:43,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:43,529 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 10 states. [2020-10-13 23:23:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:43,836 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-13 23:23:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:23:43,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:23:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:43,837 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:23:43,837 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:23:43,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:23:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:23:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2020-10-13 23:23:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:23:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-13 23:23:43,845 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 39 [2020-10-13 23:23:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:43,845 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-13 23:23:43,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-13 23:23:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:23:43,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:43,846 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:43,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:23:43,847 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash -76964942, now seen corresponding path program 7 times [2020-10-13 23:23:43,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:43,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764079815] [2020-10-13 23:23:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:48,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:23:48,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4693 [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:23:48,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:48,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:48,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:48,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:23:48,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764079815] [2020-10-13 23:23:48,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:48,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:48,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296366014] [2020-10-13 23:23:48,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:48,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:48,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:48,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:48,631 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-10-13 23:23:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:49,006 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2020-10-13 23:23:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:23:49,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 23:23:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:49,008 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:23:49,008 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:23:49,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:23:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:23:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-13 23:23:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:23:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-13 23:23:49,021 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2020-10-13 23:23:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:49,022 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-13 23:23:49,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-13 23:23:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:23:49,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:49,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:49,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:23:49,023 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash -950853125, now seen corresponding path program 8 times [2020-10-13 23:23:49,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:49,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732738664] [2020-10-13 23:23:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:49,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:52,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:52,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:23:52,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:52,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3814 [2020-10-13 23:23:52,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:52,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:23:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:52,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:23:52,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:52,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:52,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:52,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:52,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:23:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732738664] [2020-10-13 23:23:52,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:52,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:52,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707453358] [2020-10-13 23:23:52,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:52,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:52,926 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-10-13 23:23:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:53,305 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2020-10-13 23:23:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:23:53,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-13 23:23:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:53,307 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:23:53,307 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:23:53,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:23:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:23:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2020-10-13 23:23:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:23:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-13 23:23:53,315 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 41 [2020-10-13 23:23:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:53,315 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-13 23:23:53,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-13 23:23:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:23:53,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:53,316 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:53,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:23:53,316 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -136199211, now seen corresponding path program 9 times [2020-10-13 23:23:53,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:53,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350371905] [2020-10-13 23:23:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:53,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:57,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:23:57,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:57,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4347 [2020-10-13 23:23:57,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:57,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:57,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:23:57,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:57,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:57,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:57,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:57,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:57,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:57,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:57,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:23:57,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350371905] [2020-10-13 23:23:57,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:57,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:57,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205335300] [2020-10-13 23:23:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:57,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:57,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:57,746 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 9 states. [2020-10-13 23:23:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:57,882 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-13 23:23:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:23:57,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-13 23:23:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:57,884 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:23:57,884 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:23:57,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:23:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 23:23:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:23:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-13 23:23:57,891 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 41 [2020-10-13 23:23:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:57,892 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-13 23:23:57,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-13 23:23:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:23:57,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:57,893 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:57,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:23:57,893 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1620409037, now seen corresponding path program 10 times [2020-10-13 23:23:57,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:57,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356495716] [2020-10-13 23:23:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:57,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:02,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:02,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:24:02,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:24:02,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:24:02,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:02,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:02,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:02,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:02,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:24:02,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:02,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:02,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:02,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:02,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:02,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:02,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:02,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:02,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:02,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:02,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:02,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:02,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:24:02,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356495716] [2020-10-13 23:24:02,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:02,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:24:02,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567658805] [2020-10-13 23:24:02,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:24:02,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:24:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:02,980 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 11 states. [2020-10-13 23:24:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:03,385 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-13 23:24:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:24:03,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 23:24:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:03,387 INFO L225 Difference]: With dead ends: 118 [2020-10-13 23:24:03,387 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:24:03,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:24:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:24:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2020-10-13 23:24:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:24:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-13 23:24:03,402 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 43 [2020-10-13 23:24:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:03,403 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-13 23:24:03,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:24:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-13 23:24:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:24:03,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:03,403 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:03,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:24:03,404 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1778041656, now seen corresponding path program 6 times [2020-10-13 23:24:03,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:03,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050750304] [2020-10-13 23:24:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:03,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:05,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:24:05,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:24:05,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:05,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:05,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:05,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:05,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:05,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:05,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:05,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:05,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:05,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:05,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:24:05,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050750304] [2020-10-13 23:24:05,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:05,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:24:05,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558424298] [2020-10-13 23:24:05,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:24:05,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:24:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:24:05,588 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 10 states. [2020-10-13 23:24:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:05,951 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2020-10-13 23:24:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:24:05,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 23:24:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:05,952 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:24:05,953 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:24:05,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:24:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:24:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-13 23:24:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:24:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-13 23:24:05,975 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 44 [2020-10-13 23:24:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:05,975 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-13 23:24:05,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:24:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-13 23:24:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:24:05,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:05,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:05,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:24:05,980 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -40103022, now seen corresponding path program 11 times [2020-10-13 23:24:05,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:05,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641141296] [2020-10-13 23:24:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:05,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:11,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:11,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:24:11,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:24:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:24:11,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:11,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:24:11,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:11,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:11,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:11,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:11,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:11,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:11,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:11,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:11,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:24:11,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641141296] [2020-10-13 23:24:11,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:11,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:24:11,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966185399] [2020-10-13 23:24:11,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:24:11,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:24:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:11,144 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 11 states. [2020-10-13 23:24:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:11,680 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2020-10-13 23:24:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:24:11,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 23:24:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:11,682 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:24:11,682 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 23:24:11,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:24:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 23:24:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2020-10-13 23:24:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:24:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-13 23:24:11,693 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 44 [2020-10-13 23:24:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:11,694 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-13 23:24:11,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:24:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-13 23:24:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:24:11,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:11,695 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:11,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:24:11,695 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash 336306967, now seen corresponding path program 12 times [2020-10-13 23:24:11,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:11,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888768651] [2020-10-13 23:24:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:11,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:11,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:15,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:16,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:24:16,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:24:16,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:24:16,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:16,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:16,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:16,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:16,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:24:16,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:16,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:16,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:16,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:16,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:16,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:16,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:16,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:24:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:24:16,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888768651] [2020-10-13 23:24:16,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:16,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:24:16,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819846807] [2020-10-13 23:24:16,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:24:16,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:24:16,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:16,798 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 11 states. [2020-10-13 23:24:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:17,162 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2020-10-13 23:24:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:24:17,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 23:24:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:17,166 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:24:17,166 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:24:17,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:24:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:24:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2020-10-13 23:24:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:24:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-13 23:24:17,181 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 45 [2020-10-13 23:24:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:17,181 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-13 23:24:17,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:24:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-13 23:24:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:24:17,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:17,182 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:17,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:24:17,182 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1534670449, now seen corresponding path program 13 times [2020-10-13 23:24:17,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:17,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973843341] [2020-10-13 23:24:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:19,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:20,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:20,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:21,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:24:22,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:22,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:22,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:22,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:24:22,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973843341] [2020-10-13 23:24:22,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:22,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:22,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963647302] [2020-10-13 23:24:22,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:22,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:22,319 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 12 states. [2020-10-13 23:24:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:22,800 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2020-10-13 23:24:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:24:22,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-13 23:24:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:22,803 INFO L225 Difference]: With dead ends: 182 [2020-10-13 23:24:22,803 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:24:22,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:24:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:24:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 78. [2020-10-13 23:24:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:24:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-13 23:24:22,820 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 45 [2020-10-13 23:24:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:22,821 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-13 23:24:22,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-13 23:24:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:24:22,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:22,822 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:22,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:24:22,823 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2011074408, now seen corresponding path program 14 times [2020-10-13 23:24:22,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:22,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594130298] [2020-10-13 23:24:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:27,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:24:27,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:24:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:28,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:28,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:28,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:28,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:28,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:28,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:28,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 23:24:28,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594130298] [2020-10-13 23:24:28,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:28,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:24:28,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831815971] [2020-10-13 23:24:28,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:24:28,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:28,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:24:28,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:24:28,179 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 14 states. [2020-10-13 23:24:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:28,839 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-10-13 23:24:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:24:28,840 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-13 23:24:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:28,841 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:24:28,841 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 23:24:28,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:24:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 23:24:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2020-10-13 23:24:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:24:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2020-10-13 23:24:28,862 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 48 [2020-10-13 23:24:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:28,862 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2020-10-13 23:24:28,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:24:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2020-10-13 23:24:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:24:28,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:28,863 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:28,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:24:28,864 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1196420494, now seen corresponding path program 15 times [2020-10-13 23:24:28,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:28,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440057624] [2020-10-13 23:24:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:28,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:30,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:33,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:24:33,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 23:24:33,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:24:33,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:33,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:24:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:33,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:24:33,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:33,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:33,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:33,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:33,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:24:33,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440057624] [2020-10-13 23:24:33,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:33,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:33,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923570474] [2020-10-13 23:24:33,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:33,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:33,984 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand 12 states. [2020-10-13 23:24:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:34,597 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2020-10-13 23:24:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:24:34,598 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 23:24:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:34,601 INFO L225 Difference]: With dead ends: 200 [2020-10-13 23:24:34,601 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 23:24:34,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:24:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 23:24:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 116. [2020-10-13 23:24:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:24:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2020-10-13 23:24:34,627 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 48 [2020-10-13 23:24:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:34,627 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2020-10-13 23:24:34,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2020-10-13 23:24:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:24:34,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:34,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:34,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:24:34,629 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2143344278, now seen corresponding path program 16 times [2020-10-13 23:24:34,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:34,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090819745] [2020-10-13 23:24:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:36,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:24:36,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:24:36,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:36,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:36,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:36,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:36,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:36,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:36,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:36,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:36,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:36,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-13 23:24:36,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090819745] [2020-10-13 23:24:36,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:24:36,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:24:36,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103848834] [2020-10-13 23:24:36,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:24:36,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:24:36,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:24:36,782 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand 4 states. [2020-10-13 23:24:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:36,837 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2020-10-13 23:24:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:24:36,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-13 23:24:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:36,839 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:24:36,839 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:24:36,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:24:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:24:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-13 23:24:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:24:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-10-13 23:24:36,851 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 48 [2020-10-13 23:24:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:36,852 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-10-13 23:24:36,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:24:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-10-13 23:24:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:24:36,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:36,852 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:36,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:24:36,853 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:36,853 INFO L82 PathProgramCache]: Analyzing trace with hash 218639923, now seen corresponding path program 17 times [2020-10-13 23:24:36,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:36,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489223700] [2020-10-13 23:24:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:37,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:38,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:38,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:40,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:40,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:40,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:41,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:24:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:24:41,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:41,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:41,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:41,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:41,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:41,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:41,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:41,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:41,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:24:41,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489223700] [2020-10-13 23:24:41,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:41,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:41,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294588964] [2020-10-13 23:24:41,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:41,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:41,970 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 12 states. [2020-10-13 23:24:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:42,405 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2020-10-13 23:24:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:24:42,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 23:24:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:42,409 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:24:42,409 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:24:42,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:24:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:24:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 89. [2020-10-13 23:24:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 23:24:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-10-13 23:24:42,427 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 49 [2020-10-13 23:24:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:42,427 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-10-13 23:24:42,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-10-13 23:24:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:24:42,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:42,428 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:42,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:24:42,428 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 794710797, now seen corresponding path program 18 times [2020-10-13 23:24:42,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:42,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874353365] [2020-10-13 23:24:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:42,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:43,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:43,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:45,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:47,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:24:47,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:24:47,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:24:47,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:47,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:24:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:24:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:47,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:47,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:47,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:47,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:24:47,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:47,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:47,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:47,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:47,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:47,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:24:47,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874353365] [2020-10-13 23:24:47,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:47,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:24:47,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943418744] [2020-10-13 23:24:47,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:24:47,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:47,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:24:47,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:24:47,613 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 13 states. [2020-10-13 23:24:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:48,096 INFO L93 Difference]: Finished difference Result 196 states and 220 transitions. [2020-10-13 23:24:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:24:48,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-13 23:24:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:48,099 INFO L225 Difference]: With dead ends: 196 [2020-10-13 23:24:48,099 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:24:48,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:24:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:24:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-13 23:24:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:24:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-10-13 23:24:48,114 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 49 [2020-10-13 23:24:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:48,115 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-10-13 23:24:48,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:24:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-10-13 23:24:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:24:48,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:48,116 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:48,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:24:48,116 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1423623416, now seen corresponding path program 19 times [2020-10-13 23:24:48,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:48,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001650347] [2020-10-13 23:24:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:49,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:50,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:53,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:53,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:24:53,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:24:53,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:24:53,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:53,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:53,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:24:53,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:53,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:24:53,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:53,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:53,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:53,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:53,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:53,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:53,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:53,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:53,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 23:24:53,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001650347] [2020-10-13 23:24:53,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:53,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:24:53,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289859323] [2020-10-13 23:24:53,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:24:53,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:24:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:24:53,408 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 16 states. [2020-10-13 23:24:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:53,903 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2020-10-13 23:24:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:24:53,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-13 23:24:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:53,907 INFO L225 Difference]: With dead ends: 123 [2020-10-13 23:24:53,907 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:24:53,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:24:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:24:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-13 23:24:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:24:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-13 23:24:53,923 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 52 [2020-10-13 23:24:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:53,924 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-13 23:24:53,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:24:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-13 23:24:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:24:53,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:53,925 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:53,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:24:53,925 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1672980398, now seen corresponding path program 20 times [2020-10-13 23:24:53,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:53,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232465660] [2020-10-13 23:24:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:53,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:54,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:56,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:56,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:58,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:58,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:24:58,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 23:24:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:24:58,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:58,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:24:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:24:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:59,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:59,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:59,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:59,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:59,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:24:59,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232465660] [2020-10-13 23:24:59,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:59,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:24:59,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130908042] [2020-10-13 23:24:59,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:24:59,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:24:59,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:24:59,058 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 13 states. [2020-10-13 23:24:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:59,531 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2020-10-13 23:24:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:24:59,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 23:24:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:59,533 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:24:59,533 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:24:59,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:24:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:24:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2020-10-13 23:24:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:24:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-13 23:24:59,552 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 52 [2020-10-13 23:24:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:59,552 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-13 23:24:59,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:24:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-13 23:24:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:24:59,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:59,553 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:59,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:24:59,553 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash -862600369, now seen corresponding path program 21 times [2020-10-13 23:24:59,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:59,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216626888] [2020-10-13 23:24:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:01,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:02,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:04,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:04,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:04,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:04,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:25:04,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 23:25:04,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:04,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:04,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:25:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:25:04,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:04,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:04,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:04,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:04,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:04,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:04,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:04,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:04,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:04,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:04,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:04,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:25:04,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216626888] [2020-10-13 23:25:04,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:04,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:25:04,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771942313] [2020-10-13 23:25:04,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:25:04,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:25:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:25:04,684 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 13 states. [2020-10-13 23:25:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:05,221 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-10-13 23:25:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:25:05,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-13 23:25:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:05,224 INFO L225 Difference]: With dead ends: 151 [2020-10-13 23:25:05,224 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:25:05,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:25:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:25:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 95. [2020-10-13 23:25:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:25:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-13 23:25:05,241 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 53 [2020-10-13 23:25:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:05,241 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-13 23:25:05,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:25:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-13 23:25:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:25:05,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:05,242 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:05,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:25:05,242 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1309271639, now seen corresponding path program 22 times [2020-10-13 23:25:05,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:05,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592903050] [2020-10-13 23:25:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:05,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:08,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:09,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:10,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:10,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:10,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:25:10,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:25:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:25:10,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:10,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:25:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:25:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:10,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:10,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:10,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:10,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:10,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:10,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:10,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:10,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:10,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:10,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:10,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:10,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:25:10,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592903050] [2020-10-13 23:25:10,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:10,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:10,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719388264] [2020-10-13 23:25:10,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:10,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:10,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:10,393 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 14 states. [2020-10-13 23:25:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:11,017 INFO L93 Difference]: Finished difference Result 214 states and 241 transitions. [2020-10-13 23:25:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:25:11,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 23:25:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:11,021 INFO L225 Difference]: With dead ends: 214 [2020-10-13 23:25:11,022 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:25:11,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:25:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:25:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-13 23:25:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 23:25:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-13 23:25:11,042 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 53 [2020-10-13 23:25:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:11,042 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-13 23:25:11,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-13 23:25:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:25:11,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:11,043 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:11,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:25:11,044 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1874952280, now seen corresponding path program 23 times [2020-10-13 23:25:11,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:11,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955192616] [2020-10-13 23:25:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:11,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:14,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:25:16,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 23:25:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:25:16,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:25:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:25:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:16,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:16,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:16,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:25:16,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:16,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:25:16,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955192616] [2020-10-13 23:25:16,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:16,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:25:16,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852357567] [2020-10-13 23:25:16,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:25:16,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:25:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:25:16,176 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 13 states. [2020-10-13 23:25:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:16,644 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2020-10-13 23:25:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:25:16,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-13 23:25:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:16,646 INFO L225 Difference]: With dead ends: 164 [2020-10-13 23:25:16,646 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:25:16,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:25:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:25:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2020-10-13 23:25:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:25:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-13 23:25:16,664 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 56 [2020-10-13 23:25:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:16,664 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-13 23:25:16,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:25:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-13 23:25:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:25:16,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:16,666 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:16,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:25:16,666 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:16,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1843944142, now seen corresponding path program 24 times [2020-10-13 23:25:16,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:16,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857225137] [2020-10-13 23:25:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:17,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:19,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:20,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:20,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:20,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:21,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:21,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:21,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:21,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:25:21,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:25:21,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:21,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:21,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:21,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:25:21,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:21,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:25:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:21,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:21,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:21,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:21,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:21,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:21,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:21,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:21,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:21,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:25:21,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857225137] [2020-10-13 23:25:21,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:21,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:21,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757914562] [2020-10-13 23:25:21,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:21,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:21,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:21,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:21,849 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 14 states. [2020-10-13 23:25:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:22,439 INFO L93 Difference]: Finished difference Result 163 states and 180 transitions. [2020-10-13 23:25:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:25:22,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 23:25:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:22,441 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:25:22,441 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:25:22,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:25:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:25:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 98. [2020-10-13 23:25:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:25:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-13 23:25:22,456 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 56 [2020-10-13 23:25:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:22,456 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-13 23:25:22,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-13 23:25:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:25:22,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:22,457 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:22,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:25:22,457 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash 771842667, now seen corresponding path program 25 times [2020-10-13 23:25:22,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:22,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513055334] [2020-10-13 23:25:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:23,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:23,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:23,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:24,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:24,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:24,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:24,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:25,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:26,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:26,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:26,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:26,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:26,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:27,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:27,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:25:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 23:25:27,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:25:27,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:27,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:25:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:27,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:25:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:27,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:27,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:27,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:27,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:27,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:27,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:27,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:27,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:25:27,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513055334] [2020-10-13 23:25:27,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:27,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:27,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260585048] [2020-10-13 23:25:27,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:27,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:27,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:27,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:27,604 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 14 states. [2020-10-13 23:25:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:28,145 INFO L93 Difference]: Finished difference Result 171 states and 188 transitions. [2020-10-13 23:25:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:25:28,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-13 23:25:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:28,147 INFO L225 Difference]: With dead ends: 171 [2020-10-13 23:25:28,147 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:25:28,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:25:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:25:28,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 98. [2020-10-13 23:25:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:25:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-13 23:25:28,160 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 57 [2020-10-13 23:25:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:28,160 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-13 23:25:28,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-13 23:25:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:25:28,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:28,161 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:28,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:25:28,161 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1017481797, now seen corresponding path program 26 times [2020-10-13 23:25:28,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:28,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276411842] [2020-10-13 23:25:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:25:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:33,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:25:33,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:33,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:33,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:33,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:33,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:25:33,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276411842] [2020-10-13 23:25:33,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:33,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:25:33,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843703776] [2020-10-13 23:25:33,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:25:33,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:33,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:25:33,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:25:33,337 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 15 states. [2020-10-13 23:25:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:34,028 INFO L93 Difference]: Finished difference Result 226 states and 254 transitions. [2020-10-13 23:25:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:25:34,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-13 23:25:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:34,031 INFO L225 Difference]: With dead ends: 226 [2020-10-13 23:25:34,031 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 23:25:34,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=813, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:25:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 23:25:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-10-13 23:25:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:25:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-13 23:25:34,057 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 57 [2020-10-13 23:25:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:34,057 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-13 23:25:34,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:25:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-13 23:25:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:25:34,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:34,058 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:34,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:25:34,059 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash -192912712, now seen corresponding path program 27 times [2020-10-13 23:25:34,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:34,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994467243] [2020-10-13 23:25:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:36,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:36,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:36,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 23:25:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:39,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:39,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:25:39,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994467243] [2020-10-13 23:25:39,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:39,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:39,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091197188] [2020-10-13 23:25:39,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:39,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:39,226 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 14 states. [2020-10-13 23:25:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:39,791 INFO L93 Difference]: Finished difference Result 173 states and 190 transitions. [2020-10-13 23:25:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:25:39,792 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-13 23:25:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:39,794 INFO L225 Difference]: With dead ends: 173 [2020-10-13 23:25:39,795 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:25:39,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:25:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:25:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 102. [2020-10-13 23:25:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:25:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-13 23:25:39,813 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 60 [2020-10-13 23:25:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:39,813 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-13 23:25:39,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-13 23:25:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:25:39,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:39,814 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:39,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:25:39,815 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash -639583982, now seen corresponding path program 28 times [2020-10-13 23:25:39,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:39,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470944842] [2020-10-13 23:25:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:41,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:41,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:42,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:44,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:25:44,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:25:44,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 23:25:44,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:44,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:44,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:25:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 23:25:44,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:45,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:45,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:45,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:45,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:45,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:45,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:45,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:45,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:45,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:45,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:45,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:25:45,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470944842] [2020-10-13 23:25:45,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:45,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:25:45,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077856684] [2020-10-13 23:25:45,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:25:45,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:25:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:25:45,207 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 15 states. [2020-10-13 23:25:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:46,117 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2020-10-13 23:25:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:25:46,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-13 23:25:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:46,120 INFO L225 Difference]: With dead ends: 177 [2020-10-13 23:25:46,120 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 23:25:46,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:25:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 23:25:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 102. [2020-10-13 23:25:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:25:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-13 23:25:46,156 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 60 [2020-10-13 23:25:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:46,156 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-13 23:25:46,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:25:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-13 23:25:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:25:46,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:46,158 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:46,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:25:46,158 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:46,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1262610093, now seen corresponding path program 29 times [2020-10-13 23:25:46,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:46,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809136542] [2020-10-13 23:25:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:46,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:47,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:47,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:49,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:50,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:50,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:51,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:25:51,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:51,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:51,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:51,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:51,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:25:51,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809136542] [2020-10-13 23:25:51,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:51,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:51,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643538244] [2020-10-13 23:25:51,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:51,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:51,327 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 14 states. [2020-10-13 23:25:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:51,928 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2020-10-13 23:25:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:25:51,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-13 23:25:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:51,931 INFO L225 Difference]: With dead ends: 182 [2020-10-13 23:25:51,932 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:25:51,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:25:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:25:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 108. [2020-10-13 23:25:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:25:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2020-10-13 23:25:51,953 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 61 [2020-10-13 23:25:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:51,954 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2020-10-13 23:25:51,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2020-10-13 23:25:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:25:51,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:51,955 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:51,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:25:51,955 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1838680967, now seen corresponding path program 30 times [2020-10-13 23:25:51,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:51,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796261689] [2020-10-13 23:25:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:51,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:53,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:53,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:56,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:25:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:57,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:57,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:57,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:57,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:57,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:57,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:57,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:57,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:57,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:57,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:57,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:25:57,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796261689] [2020-10-13 23:25:57,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:57,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:25:57,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606893642] [2020-10-13 23:25:57,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:25:57,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:25:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:25:57,152 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand 15 states. [2020-10-13 23:25:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:57,922 INFO L93 Difference]: Finished difference Result 187 states and 205 transitions. [2020-10-13 23:25:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:25:57,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-13 23:25:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:57,926 INFO L225 Difference]: With dead ends: 187 [2020-10-13 23:25:57,926 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 23:25:57,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=813, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:25:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 23:25:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 108. [2020-10-13 23:25:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:25:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2020-10-13 23:25:57,964 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 61 [2020-10-13 23:25:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:57,964 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2020-10-13 23:25:57,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:25:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2020-10-13 23:25:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:25:57,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:57,966 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:57,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:25:57,966 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:57,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1674683617, now seen corresponding path program 31 times [2020-10-13 23:25:57,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:57,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561028200] [2020-10-13 23:25:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:57,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:00,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:02,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:02,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:02,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:26:02,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:26:02,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:26:02,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:02,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:26:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:26:02,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:03,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:03,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:03,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:03,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:03,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:26:03,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561028200] [2020-10-13 23:26:03,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:03,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:26:03,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306573257] [2020-10-13 23:26:03,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:26:03,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:03,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:26:03,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:26:03,195 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand 16 states. [2020-10-13 23:26:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:04,052 INFO L93 Difference]: Finished difference Result 246 states and 276 transitions. [2020-10-13 23:26:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:26:04,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-13 23:26:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:04,054 INFO L225 Difference]: With dead ends: 246 [2020-10-13 23:26:04,055 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:26:04,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:26:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:26:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2020-10-13 23:26:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:26:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2020-10-13 23:26:04,099 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 61 [2020-10-13 23:26:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:04,100 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2020-10-13 23:26:04,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:26:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2020-10-13 23:26:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:26:04,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:04,101 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:04,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:26:04,102 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash -690869224, now seen corresponding path program 32 times [2020-10-13 23:26:04,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:04,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155575046] [2020-10-13 23:26:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:04,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:04,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:06,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:06,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:07,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:07,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:09,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:09,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:09,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:26:09,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:26:09,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5261 [2020-10-13 23:26:09,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:09,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:26:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:26:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:09,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:09,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:09,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:09,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:09,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:09,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:09,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:09,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:09,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:09,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:26:09,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155575046] [2020-10-13 23:26:09,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:09,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:26:09,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346082573] [2020-10-13 23:26:09,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:26:09,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:09,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:26:09,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:26:09,619 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand 15 states. [2020-10-13 23:26:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:10,234 INFO L93 Difference]: Finished difference Result 196 states and 214 transitions. [2020-10-13 23:26:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:26:10,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-13 23:26:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:10,237 INFO L225 Difference]: With dead ends: 196 [2020-10-13 23:26:10,237 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 23:26:10,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=813, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:26:10,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 23:26:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 112. [2020-10-13 23:26:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:26:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2020-10-13 23:26:10,262 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 64 [2020-10-13 23:26:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:10,263 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2020-10-13 23:26:10,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:26:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2020-10-13 23:26:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:26:10,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:10,263 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:10,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:26:10,264 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:10,264 INFO L82 PathProgramCache]: Analyzing trace with hash -445230094, now seen corresponding path program 33 times [2020-10-13 23:26:10,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:10,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502023598] [2020-10-13 23:26:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:12,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:13,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:14,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:14,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:14,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:15,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:15,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:15,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:26:15,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:15,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:15,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:15,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:15,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:15,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:15,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:15,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:26:15,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502023598] [2020-10-13 23:26:15,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:15,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:26:15,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551592189] [2020-10-13 23:26:15,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:26:15,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:26:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:26:15,492 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand 16 states. [2020-10-13 23:26:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:16,314 INFO L93 Difference]: Finished difference Result 191 states and 210 transitions. [2020-10-13 23:26:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:26:16,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-13 23:26:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:16,317 INFO L225 Difference]: With dead ends: 191 [2020-10-13 23:26:16,317 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 23:26:16,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:26:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 23:26:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 112. [2020-10-13 23:26:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:26:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2020-10-13 23:26:16,341 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 64 [2020-10-13 23:26:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:16,342 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2020-10-13 23:26:16,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:26:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2020-10-13 23:26:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:26:16,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:16,343 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:16,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:26:16,343 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:16,344 INFO L82 PathProgramCache]: Analyzing trace with hash -481925047, now seen corresponding path program 34 times [2020-10-13 23:26:16,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:16,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442885189] [2020-10-13 23:26:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:16,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:18,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:19,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:20,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:20,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:20,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:21,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:21,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:21,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:21,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:26:21,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:26:21,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:26:21,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:21,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:21,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:26:21,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:21,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:26:21,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:22,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:22,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:22,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:22,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:22,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-10-13 23:26:22,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442885189] [2020-10-13 23:26:22,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:22,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:26:22,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639207602] [2020-10-13 23:26:22,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:26:22,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:22,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:26:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:26:22,070 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand 18 states. [2020-10-13 23:26:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:23,004 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2020-10-13 23:26:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:26:23,005 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-10-13 23:26:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:23,006 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:26:23,006 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:26:23,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:26:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:26:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2020-10-13 23:26:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:26:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-10-13 23:26:23,041 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 65 [2020-10-13 23:26:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:23,042 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-10-13 23:26:23,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:26:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-10-13 23:26:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:26:23,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:23,043 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:23,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:26:23,043 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash -928596317, now seen corresponding path program 35 times [2020-10-13 23:26:23,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:23,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922424675] [2020-10-13 23:26:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:23,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:26:28,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:28,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:28,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:28,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:28,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:28,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:28,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:28,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:28,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:28,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:28,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:28,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:26:28,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922424675] [2020-10-13 23:26:28,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:28,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:26:28,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118600672] [2020-10-13 23:26:28,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:26:28,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:26:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:26:28,279 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 16 states. [2020-10-13 23:26:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:29,081 INFO L93 Difference]: Finished difference Result 214 states and 235 transitions. [2020-10-13 23:26:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:26:29,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-13 23:26:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:29,083 INFO L225 Difference]: With dead ends: 214 [2020-10-13 23:26:29,083 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:26:29,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:26:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:26:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 123. [2020-10-13 23:26:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:26:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-10-13 23:26:29,118 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 65 [2020-10-13 23:26:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:29,118 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-10-13 23:26:29,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:26:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-10-13 23:26:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:26:29,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:29,119 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:29,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:26:29,120 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 383740285, now seen corresponding path program 36 times [2020-10-13 23:26:29,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:29,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205641841] [2020-10-13 23:26:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:29,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:31,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:33,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:34,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:26:34,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:26:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:34,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:34,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:34,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:34,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:34,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:34,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:34,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:26:34,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205641841] [2020-10-13 23:26:34,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:34,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:26:34,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927011265] [2020-10-13 23:26:34,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:26:34,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:26:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:26:34,335 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 17 states. [2020-10-13 23:26:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:35,204 INFO L93 Difference]: Finished difference Result 282 states and 317 transitions. [2020-10-13 23:26:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:26:35,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-10-13 23:26:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:35,206 INFO L225 Difference]: With dead ends: 282 [2020-10-13 23:26:35,206 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 23:26:35,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1117, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:26:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 23:26:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 127. [2020-10-13 23:26:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:26:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-10-13 23:26:35,244 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 65 [2020-10-13 23:26:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:35,244 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-10-13 23:26:35,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:26:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-10-13 23:26:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:26:35,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:35,245 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:35,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:26:35,246 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1048681592, now seen corresponding path program 37 times [2020-10-13 23:26:35,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:35,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428198762] [2020-10-13 23:26:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:35,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:35,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:38,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:40,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:26:40,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:26:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:26:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:40,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:26:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:26:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:40,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:40,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:40,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:40,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:40,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:40,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:40,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:40,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:26:40,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428198762] [2020-10-13 23:26:40,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:40,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:26:40,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511350541] [2020-10-13 23:26:40,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:26:40,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:26:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:26:40,445 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 16 states. [2020-10-13 23:26:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:41,189 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2020-10-13 23:26:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:26:41,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-13 23:26:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:41,192 INFO L225 Difference]: With dead ends: 216 [2020-10-13 23:26:41,192 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:26:41,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:26:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:26:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 127. [2020-10-13 23:26:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:26:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-10-13 23:26:41,230 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 68 [2020-10-13 23:26:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:41,230 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-10-13 23:26:41,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:26:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-10-13 23:26:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:26:41,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:41,231 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:41,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:26:41,231 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash 884684242, now seen corresponding path program 38 times [2020-10-13 23:26:41,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:41,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269621203] [2020-10-13 23:26:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:41,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:41,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:43,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:44,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:45,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:46,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:46,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:46,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:26:46,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:46,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:46,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:46,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:46,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:46,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:46,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:46,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:46,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:26:46,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269621203] [2020-10-13 23:26:46,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:46,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:26:46,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82930955] [2020-10-13 23:26:46,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:26:46,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:46,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:26:46,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:26:46,445 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 17 states. [2020-10-13 23:26:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:47,316 INFO L93 Difference]: Finished difference Result 216 states and 238 transitions. [2020-10-13 23:26:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:26:47,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 23:26:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:47,319 INFO L225 Difference]: With dead ends: 216 [2020-10-13 23:26:47,319 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:26:47,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1117, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:26:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:26:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 127. [2020-10-13 23:26:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:26:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-10-13 23:26:47,352 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 68 [2020-10-13 23:26:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:47,352 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-10-13 23:26:47,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:26:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-10-13 23:26:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:26:47,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:47,353 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:47,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:26:47,354 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:47,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1457066824, now seen corresponding path program 1 times [2020-10-13 23:26:47,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:47,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818398142] [2020-10-13 23:26:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:47,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:47,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking...