/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-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:10:41,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:10:41,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:10:41,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:10:41,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:10:41,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:10:41,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:10:41,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:10:41,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:10:41,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:10:41,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:10:41,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:10:41,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:10:41,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:10:41,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:10:41,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:10:41,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:10:41,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:10:41,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:10:41,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:10:41,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:10:41,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:10:41,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:10:41,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:10:41,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:10:41,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:10:41,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:10:41,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:10:41,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:10:41,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:10:41,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:10:41,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:10:41,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:10:41,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:10:41,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:10:41,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:10:41,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:10:41,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:10:41,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:10:41,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:10:41,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:10:41,585 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 23:10:41,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:10:41,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:10:41,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:10:41,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:10:41,630 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:10:41,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:10:41,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:10:41,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:10:41,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:10:41,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:10:41,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:10:41,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:10:41,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:10:41,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:10:41,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:10:41,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:10:41,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:10:41,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:10:41,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:10:41,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:10:41,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:10:41,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:10:41,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:10:41,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:10:41,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:10:41,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:10:41,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:10:41,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:10:41,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:10:41,636 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 23:10:41,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:10:41,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:10:41,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:10:41,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:10:41,923 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:10:41,924 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_pair_sum_const.c [2020-10-13 23:10:41,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/382e42064/689924ecc0594441b74d7ec86fdd8ca9/FLAG8317cf4fa [2020-10-13 23:10:42,437 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:10:42,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_pair_sum_const.c [2020-10-13 23:10:42,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/382e42064/689924ecc0594441b74d7ec86fdd8ca9/FLAG8317cf4fa [2020-10-13 23:10:42,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/382e42064/689924ecc0594441b74d7ec86fdd8ca9 [2020-10-13 23:10:42,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:10:42,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:10:42,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:10:42,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:10:42,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:10:42,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:42" (1/1) ... [2020-10-13 23:10:42,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4576ff6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:42, skipping insertion in model container [2020-10-13 23:10:42,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:42" (1/1) ... [2020-10-13 23:10:42,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:10:42,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:10:43,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:10:43,036 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:10:43,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:10:43,078 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:10:43,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43 WrapperNode [2020-10-13 23:10:43,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:10:43,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:10:43,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:10:43,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:10:43,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (1/1) ... [2020-10-13 23:10:43,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:10:43,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:10:43,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:10:43,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:10:43,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (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 23:10:43,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:10:43,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:10:43,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:10:43,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:10:43,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:10:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:10:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:10:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:10:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:10:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:10:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:10:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:10:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:10:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:10:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:10:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:10:43,521 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:10:43,522 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:10:43,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:43 BoogieIcfgContainer [2020-10-13 23:10:43,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:10:43,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:10:43,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:10:43,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:10:43,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:10:42" (1/3) ... [2020-10-13 23:10:43,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e474b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:43, skipping insertion in model container [2020-10-13 23:10:43,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:43" (2/3) ... [2020-10-13 23:10:43,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e474b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:43, skipping insertion in model container [2020-10-13 23:10:43,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:43" (3/3) ... [2020-10-13 23:10:43,536 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2020-10-13 23:10:43,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:10:43,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:10:43,572 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:10:43,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:10:43,598 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:10:43,599 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:10:43,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:10:43,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:10:43,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:10:43,600 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:10:43,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:10:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 23:10:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:10:43,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:43,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:43,629 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash -592238034, now seen corresponding path program 1 times [2020-10-13 23:10:43,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:43,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071082064] [2020-10-13 23:10:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:43,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:43,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:43,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:10:44,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:44,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-13 23:10:44,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:10:44,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:10:44,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:10:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:44,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:10:44,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:44,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:44,309 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 23:10:44,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071082064] [2020-10-13 23:10:44,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:10:44,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:10:44,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013154967] [2020-10-13 23:10:44,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:10:44,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:44,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:10:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:10:44,337 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-13 23:10:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:44,485 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-13 23:10:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:10:44,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:10:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:44,496 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:10:44,496 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:10:44,500 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 23:10:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:10:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 23:10:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:10:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 23:10:44,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-13 23:10:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:44,544 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 23:10:44,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:10:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 23:10:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:10:44,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:44,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:44,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:10:44,546 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2081730740, now seen corresponding path program 1 times [2020-10-13 23:10:44,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:44,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43013497] [2020-10-13 23:10:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:10:44,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:44,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-13 23:10:44,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:10:44,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:44,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:10:44,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:10:44,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:44,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:44,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:44,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:44,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:10:44,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:44,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:44,959 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 23:10:44,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43013497] [2020-10-13 23:10:44,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:10:44,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:10:44,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036300581] [2020-10-13 23:10:44,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:10:44,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:10:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:10:44,964 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-13 23:10:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,062 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-13 23:10:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:10:45,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 23:10:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,064 INFO L225 Difference]: With dead ends: 37 [2020-10-13 23:10:45,065 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:10:45,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:10:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-13 23:10:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:10:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 23:10:45,080 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-13 23:10:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,081 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 23:10:45,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:10:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 23:10:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:10:45,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:10:45,083 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash 941470890, now seen corresponding path program 1 times [2020-10-13 23:10:45,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907048915] [2020-10-13 23:10:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:10:45,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-13 23:10:45,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:10:45,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:45,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:10:45,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:45,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:45,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:10:45,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:45,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:45,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:45,543 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 23:10:45,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907048915] [2020-10-13 23:10:45,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:45,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:10:45,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188175135] [2020-10-13 23:10:45,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:10:45,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:10:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:10:45,547 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-13 23:10:45,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:45,757 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-13 23:10:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:10:45,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 23:10:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:45,764 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:10:45,765 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:10:45,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:10:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-10-13 23:10:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:10:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 23:10:45,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-13 23:10:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:45,794 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 23:10:45,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:10:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 23:10:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:10:45,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:45,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:45,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:10:45,797 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2146463450, now seen corresponding path program 2 times [2020-10-13 23:10:45,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:45,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174312765] [2020-10-13 23:10:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:46,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:46,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:10:46,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:10:46,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-13 23:10:46,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:46,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:10:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:46,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:10:46,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:10:47,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:47,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:47,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:47,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:47,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:47,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:47,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:10:47,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174312765] [2020-10-13 23:10:47,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:47,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:10:47,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484224759] [2020-10-13 23:10:47,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:10:47,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:47,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:10:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:10:47,058 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-13 23:10:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:47,257 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-13 23:10:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:10:47,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-13 23:10:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:47,260 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:10:47,260 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:10:47,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:10:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:10:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-10-13 23:10:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:10:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 23:10:47,277 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-13 23:10:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:47,277 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 23:10:47,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:10:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 23:10:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:10:47,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:47,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:47,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:10:47,280 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:47,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:47,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1041481634, now seen corresponding path program 3 times [2020-10-13 23:10:47,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:47,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466115922] [2020-10-13 23:10:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:47,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:47,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:50,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:10:50,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:50,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2839 [2020-10-13 23:10:50,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:50,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:10:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:50,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:10:50,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:50,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:50,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:50,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:50,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:10:50,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:50,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:10:50,208 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 23:10:50,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466115922] [2020-10-13 23:10:50,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:50,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:10:50,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674859327] [2020-10-13 23:10:50,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:10:50,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:10:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:10:50,210 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-10-13 23:10:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:50,412 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-10-13 23:10:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:10:50,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 23:10:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:50,414 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:10:50,414 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:10:50,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:10:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:10:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-13 23:10:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:10:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 23:10:50,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-13 23:10:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:50,424 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 23:10:50,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:10:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 23:10:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:10:50,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:50,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:50,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:10:50,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash -315277282, now seen corresponding path program 4 times [2020-10-13 23:10:50,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:50,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031358852] [2020-10-13 23:10:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:50,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:55,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:10:55,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:10:55,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:10:55,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:55,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:10:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:10:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:10:55,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:10:55,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:10:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:55,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:10:55,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:10:55,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:10:55,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:10:55,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:10:55,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:10:55,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:10:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:10:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:10:55,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:10:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:10:55,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031358852] [2020-10-13 23:10:55,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:10:55,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:10:55,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323609816] [2020-10-13 23:10:55,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:10:55,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:10:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:10:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:10:55,567 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-13 23:10:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:10:55,827 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-10-13 23:10:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:10:55,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-13 23:10:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:10:55,830 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:10:55,830 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:10:55,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:10:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:10:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-10-13 23:10:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:10:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 23:10:55,850 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-13 23:10:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:10:55,851 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 23:10:55,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:10:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 23:10:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:10:55,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:10:55,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:10:55,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:10:55,857 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:10:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:10:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2046759578, now seen corresponding path program 5 times [2020-10-13 23:10:55,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:10:55,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464920487] [2020-10-13 23:10:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:10:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:10:55,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:55,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:10:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:00,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:00,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:11:00,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:00,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:11:00,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:00,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:11:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:11:00,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:00,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:00,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:01,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:01,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:01,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:01,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:11:01,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:01,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:01,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:11:01,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464920487] [2020-10-13 23:11:01,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:01,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:11:01,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705283595] [2020-10-13 23:11:01,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:11:01,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:01,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:11:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:11:01,010 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2020-10-13 23:11:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:01,312 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-10-13 23:11:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:11:01,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 23:11:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:01,314 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:11:01,314 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:11:01,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:11:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:11:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2020-10-13 23:11:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:11:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 23:11:01,329 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-13 23:11:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:01,329 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 23:11:01,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:11:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 23:11:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:11:01,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:01,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:01,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:11:01,331 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1032046826, now seen corresponding path program 6 times [2020-10-13 23:11:01,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:01,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151567683] [2020-10-13 23:11:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:01,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:01,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:02,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:11:06,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:06,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:11:06,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:06,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:11:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:11:06,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:06,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:06,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:06,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:06,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:06,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:06,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:06,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:11:06,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151567683] [2020-10-13 23:11:06,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:06,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:11:06,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732335324] [2020-10-13 23:11:06,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:11:06,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:06,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:11:06,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:11:06,488 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 11 states. [2020-10-13 23:11:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:06,780 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2020-10-13 23:11:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:11:06,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-13 23:11:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:06,782 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:11:06,782 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:11:06,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:11:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:11:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-13 23:11:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:11:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 23:11:06,791 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-13 23:11:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:06,791 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 23:11:06,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:11:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 23:11:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:11:06,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:06,792 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:06,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:11:06,793 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 372747666, now seen corresponding path program 7 times [2020-10-13 23:11:06,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:06,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630979748] [2020-10-13 23:11:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:06,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:09,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:11,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:11:11,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:11,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:11:11,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:11,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:11,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:11:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:11:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:11,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:11,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:11,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:11,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:11,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:11,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:11,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:11,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:11:11,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630979748] [2020-10-13 23:11:11,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:11,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:11:11,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352889863] [2020-10-13 23:11:11,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:11:11,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:11:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:11:11,931 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2020-10-13 23:11:12,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:12,255 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-10-13 23:11:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:11:12,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 23:11:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:12,257 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:11:12,257 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:11:12,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:11:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:11:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-13 23:11:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:11:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 23:11:12,276 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-10-13 23:11:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:12,277 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 23:11:12,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:11:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 23:11:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:11:12,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:12,279 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:12,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:11:12,279 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1237551602, now seen corresponding path program 8 times [2020-10-13 23:11:12,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:12,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109917296] [2020-10-13 23:11:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:12,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:14,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:17,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:11:17,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:17,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:11:17,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:17,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:11:17,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:11:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:17,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:17,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:17,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:17,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:17,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:17,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:17,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:17,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:11:17,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109917296] [2020-10-13 23:11:17,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:17,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:11:17,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493653517] [2020-10-13 23:11:17,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:11:17,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:11:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:11:17,446 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-10-13 23:11:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:17,797 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-10-13 23:11:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:11:17,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-13 23:11:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:17,799 INFO L225 Difference]: With dead ends: 119 [2020-10-13 23:11:17,799 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 23:11:17,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:11:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 23:11:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2020-10-13 23:11:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:11:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 23:11:17,808 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 47 [2020-10-13 23:11:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:17,808 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 23:11:17,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:11:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 23:11:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:11:17,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:17,809 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:17,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:11:17,810 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1427476618, now seen corresponding path program 9 times [2020-10-13 23:11:17,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:17,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265319904] [2020-10-13 23:11:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:11:23,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:11:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5264 [2020-10-13 23:11:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:11:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:11:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:23,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:23,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:23,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:23,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:23,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:11:23,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265319904] [2020-10-13 23:11:23,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:23,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:11:23,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778063009] [2020-10-13 23:11:23,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:11:23,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:23,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:11:23,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:11:23,239 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 14 states. [2020-10-13 23:11:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:23,654 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-10-13 23:11:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:11:23,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-13 23:11:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:23,658 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:11:23,658 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:11:23,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:11:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:11:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 60. [2020-10-13 23:11:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:11:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 23:11:23,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-13 23:11:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:23,667 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 23:11:23,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:11:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 23:11:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:11:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:23,668 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:23,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:11:23,669 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1764885242, now seen corresponding path program 10 times [2020-10-13 23:11:23,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:23,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674989555] [2020-10-13 23:11:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:23,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:23,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:28,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:28,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:11:28,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:28,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-13 23:11:28,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:28,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:11:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:28,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:11:28,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:28,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:28,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:28,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:28,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:28,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:28,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:28,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:11:28,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674989555] [2020-10-13 23:11:28,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:28,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:11:28,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744103372] [2020-10-13 23:11:28,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:11:28,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:11:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:11:28,937 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 15 states. [2020-10-13 23:11:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:29,351 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2020-10-13 23:11:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:11:29,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-13 23:11:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:29,353 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:11:29,353 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:11:29,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:11:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:11:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-10-13 23:11:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:11:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 23:11:29,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-10-13 23:11:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:29,363 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 23:11:29,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:11:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 23:11:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:11:29,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:29,364 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:29,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:11:29,364 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1863271550, now seen corresponding path program 11 times [2020-10-13 23:11:29,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:29,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593801272] [2020-10-13 23:11:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:29,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:34,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:34,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:11:34,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:34,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:11:34,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:34,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:11:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:34,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:11:34,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:34,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:34,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:34,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:34,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:34,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:34,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:34,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:34,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:11:34,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593801272] [2020-10-13 23:11:34,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:34,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:11:34,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612016954] [2020-10-13 23:11:34,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:11:34,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:34,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:11:34,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:11:34,587 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2020-10-13 23:11:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:35,136 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2020-10-13 23:11:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:11:35,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-13 23:11:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:35,138 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:11:35,138 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:11:35,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:11:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:11:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 68. [2020-10-13 23:11:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:11:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 23:11:35,149 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2020-10-13 23:11:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:35,149 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 23:11:35,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:11:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 23:11:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:11:35,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:35,150 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:35,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:11:35,151 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1250479102, now seen corresponding path program 12 times [2020-10-13 23:11:35,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:35,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714297844] [2020-10-13 23:11:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:35,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:35,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:40,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:11:40,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:40,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:11:40,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:40,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:40,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:11:40,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:40,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:11:40,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:40,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:40,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:11:40,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714297844] [2020-10-13 23:11:40,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:40,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:11:40,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854951634] [2020-10-13 23:11:40,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:11:40,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:11:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:11:40,394 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 17 states. [2020-10-13 23:11:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:40,937 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2020-10-13 23:11:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:11:40,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-10-13 23:11:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:40,939 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:11:40,939 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:11:40,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:11:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:11:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 72. [2020-10-13 23:11:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:11:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-13 23:11:40,962 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-13 23:11:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:40,963 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-13 23:11:40,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:11:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-13 23:11:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:11:40,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:40,964 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:40,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:11:40,964 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1008807546, now seen corresponding path program 13 times [2020-10-13 23:11:40,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:40,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002245736] [2020-10-13 23:11:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:45,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:45,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:11:45,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:45,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:11:45,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:45,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:11:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:11:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:46,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:46,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:46,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:46,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:46,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:46,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:46,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:46,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:11:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 23:11:46,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002245736] [2020-10-13 23:11:46,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:46,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:11:46,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038400891] [2020-10-13 23:11:46,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:11:46,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:11:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:11:46,277 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 18 states. [2020-10-13 23:11:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:46,934 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2020-10-13 23:11:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:11:46,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-13 23:11:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:46,936 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:11:46,937 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:11:46,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:11:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:11:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-13 23:11:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:11:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-13 23:11:46,946 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-13 23:11:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:46,946 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-13 23:11:46,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:11:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-13 23:11:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:11:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:46,948 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:46,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:11:46,948 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -809180426, now seen corresponding path program 14 times [2020-10-13 23:11:46,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:46,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434752085] [2020-10-13 23:11:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:51,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:51,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:11:51,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:11:51,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:51,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:11:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:11:51,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:52,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:52,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:52,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:52,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:52,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:52,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:52,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:52,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:11:52,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434752085] [2020-10-13 23:11:52,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:52,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:11:52,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28712002] [2020-10-13 23:11:52,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:11:52,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:11:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:11:52,218 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 19 states. [2020-10-13 23:11:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:52,814 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2020-10-13 23:11:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:11:52,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-10-13 23:11:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:52,816 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:11:52,816 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 23:11:52,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:11:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 23:11:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 80. [2020-10-13 23:11:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:11:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 23:11:52,830 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 71 [2020-10-13 23:11:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:52,831 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 23:11:52,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:11:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 23:11:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:11:52,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:52,833 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:52,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:11:52,833 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash -520165006, now seen corresponding path program 15 times [2020-10-13 23:11:52,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:52,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079025554] [2020-10-13 23:11:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:52,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:57,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:57,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:11:57,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:11:57,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:11:57,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:58,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:11:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:11:58,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:11:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:11:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 23:11:58,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079025554] [2020-10-13 23:11:58,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:11:58,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:11:58,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840319072] [2020-10-13 23:11:58,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:11:58,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:11:58,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:11:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:11:58,141 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 20 states. [2020-10-13 23:11:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:11:58,875 INFO L93 Difference]: Finished difference Result 189 states and 209 transitions. [2020-10-13 23:11:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:11:58,876 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-13 23:11:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:11:58,878 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:11:58,878 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 23:11:58,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:11:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 23:11:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 84. [2020-10-13 23:11:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:11:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-13 23:11:58,886 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2020-10-13 23:11:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:11:58,886 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-13 23:11:58,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:11:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-13 23:11:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:11:58,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:11:58,888 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:11:58,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:11:58,888 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:11:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:11:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1020936686, now seen corresponding path program 16 times [2020-10-13 23:11:58,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:11:58,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930718663] [2020-10-13 23:11:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:11:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:11:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:11:58,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:03,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:03,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:12:03,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:12:03,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:12:03,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:03,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:03,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:12:03,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:03,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:12:03,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:04,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:12:04,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930718663] [2020-10-13 23:12:04,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:04,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:12:04,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029013821] [2020-10-13 23:12:04,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:12:04,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:12:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:12:04,180 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 21 states. [2020-10-13 23:12:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:04,918 INFO L93 Difference]: Finished difference Result 199 states and 220 transitions. [2020-10-13 23:12:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:12:04,919 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-10-13 23:12:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:04,920 INFO L225 Difference]: With dead ends: 199 [2020-10-13 23:12:04,921 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:12:04,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=836, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:12:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:12:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 88. [2020-10-13 23:12:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:12:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-13 23:12:04,930 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2020-10-13 23:12:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:04,931 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-13 23:12:04,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:12:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-13 23:12:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:12:04,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:04,932 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:04,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:12:04,932 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:04,933 INFO L82 PathProgramCache]: Analyzing trace with hash 568454250, now seen corresponding path program 17 times [2020-10-13 23:12:04,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:04,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46291405] [2020-10-13 23:12:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:12:10,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:10,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:10,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:10,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:10,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:10,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:10,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:10,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:10,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 23:12:10,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46291405] [2020-10-13 23:12:10,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:10,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:12:10,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207538881] [2020-10-13 23:12:10,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:12:10,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:12:10,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:12:10,303 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 22 states. [2020-10-13 23:12:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:11,105 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2020-10-13 23:12:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:12:11,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2020-10-13 23:12:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:11,108 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:12:11,108 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:12:11,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=930, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:12:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:12:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 92. [2020-10-13 23:12:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:12:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-13 23:12:11,120 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 83 [2020-10-13 23:12:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:11,120 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-13 23:12:11,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:12:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-13 23:12:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:12:11,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:11,122 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:11,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:12:11,122 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:11,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1071585050, now seen corresponding path program 18 times [2020-10-13 23:12:11,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:11,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799752043] [2020-10-13 23:12:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:16,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:16,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:12:16,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:16,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:16,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:16,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:16,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:16,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:16,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:16,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:16,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:16,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 23:12:16,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799752043] [2020-10-13 23:12:16,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:16,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:12:16,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595999282] [2020-10-13 23:12:16,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:12:16,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:12:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:12:16,538 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 23 states. [2020-10-13 23:12:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:17,391 INFO L93 Difference]: Finished difference Result 219 states and 242 transitions. [2020-10-13 23:12:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:12:17,392 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 87 [2020-10-13 23:12:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:17,393 INFO L225 Difference]: With dead ends: 219 [2020-10-13 23:12:17,394 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:12:17,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:12:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:12:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 96. [2020-10-13 23:12:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:12:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-13 23:12:17,409 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2020-10-13 23:12:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:17,409 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-13 23:12:17,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:12:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-13 23:12:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:12:17,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:17,414 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:17,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:12:17,414 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1188939934, now seen corresponding path program 19 times [2020-10-13 23:12:17,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:17,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430764545] [2020-10-13 23:12:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:22,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 23:12:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:12:33,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16398 [2020-10-13 23:12:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:33,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:12:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:12:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:34,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:34,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:34,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:34,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:34,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:34,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:34,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:34,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:34,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 23:12:34,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430764545] [2020-10-13 23:12:34,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:34,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:12:34,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478844671] [2020-10-13 23:12:34,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:12:34,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:12:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:12:34,197 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 24 states. [2020-10-13 23:12:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:35,227 INFO L93 Difference]: Finished difference Result 229 states and 253 transitions. [2020-10-13 23:12:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:12:35,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-10-13 23:12:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:35,230 INFO L225 Difference]: With dead ends: 229 [2020-10-13 23:12:35,230 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 23:12:35,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=673, Invalid=1133, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:12:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 23:12:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2020-10-13 23:12:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:12:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-13 23:12:35,239 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2020-10-13 23:12:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:35,239 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-13 23:12:35,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:12:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-13 23:12:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:12:35,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:35,241 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:35,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:12:35,241 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1611606050, now seen corresponding path program 20 times [2020-10-13 23:12:35,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:35,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522343515] [2020-10-13 23:12:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:35,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:40,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:40,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:12:40,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:12:40,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 23:12:40,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:40,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:12:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:12:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 23:12:40,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:12:40,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:12:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:40,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:12:40,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:12:40,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:12:40,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:12:40,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:12:40,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:12:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:12:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:12:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:12:40,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:12:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 23:12:40,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522343515] [2020-10-13 23:12:40,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:12:40,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:12:40,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329667617] [2020-10-13 23:12:40,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:12:40,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:12:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:12:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:12:40,722 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 25 states. [2020-10-13 23:12:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:12:41,820 INFO L93 Difference]: Finished difference Result 239 states and 264 transitions. [2020-10-13 23:12:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:12:41,822 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-13 23:12:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:12:41,823 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:12:41,823 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 23:12:41,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:12:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 23:12:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 104. [2020-10-13 23:12:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:12:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-13 23:12:41,833 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 95 [2020-10-13 23:12:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:12:41,833 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-13 23:12:41,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:12:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-13 23:12:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:12:41,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:12:41,835 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:12:41,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:12:41,835 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:12:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:12:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2031602266, now seen corresponding path program 21 times [2020-10-13 23:12:41,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:12:41,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92225608] [2020-10-13 23:12:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:12:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:12:41,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:12:44,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:16,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:16,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:13:16,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:13:16,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34292 [2020-10-13 23:13:16,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:16,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:13:16,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:16,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:13:16,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:16,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:16,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:16,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:16,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:16,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:16,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 23:13:16,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92225608] [2020-10-13 23:13:16,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:13:16,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925557296] [2020-10-13 23:13:16,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:13:16,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:16,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:13:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:13:16,509 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 25 states. [2020-10-13 23:13:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:16,671 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2020-10-13 23:13:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:13:16,672 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-13 23:13:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:16,673 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:13:16,673 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:13:16,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:13:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:13:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 23:13:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:13:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-13 23:13:16,685 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-13 23:13:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:16,685 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-13 23:13:16,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:13:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-13 23:13:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:13:16,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:16,686 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:16,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:13:16,687 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1306018936, now seen corresponding path program 22 times [2020-10-13 23:13:16,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:16,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817080869] [2020-10-13 23:13:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:16,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:19,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:21,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:21,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:13:21,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:13:21,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 23:13:21,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:21,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:13:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 23:13:21,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:22,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:22,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:22,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:22,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:22,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:22,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:22,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:22,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:22,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 23:13:22,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817080869] [2020-10-13 23:13:22,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:22,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:13:22,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451381744] [2020-10-13 23:13:22,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:13:22,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:13:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:13:22,210 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 26 states. [2020-10-13 23:13:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:23,342 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2020-10-13 23:13:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:13:23,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2020-10-13 23:13:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:23,344 INFO L225 Difference]: With dead ends: 205 [2020-10-13 23:13:23,345 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 23:13:23,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:13:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 23:13:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 108. [2020-10-13 23:13:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:13:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-13 23:13:23,355 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-13 23:13:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:23,355 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-13 23:13:23,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:13:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-13 23:13:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:13:23,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:23,356 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:23,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:13:23,357 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash 983699158, now seen corresponding path program 23 times [2020-10-13 23:13:23,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:23,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822995838] [2020-10-13 23:13:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:23,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:26,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:28,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:28,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:13:28,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:13:28,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-13 23:13:28,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:28,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:13:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 23:13:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:28,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:28,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:28,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:28,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 23:13:28,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822995838] [2020-10-13 23:13:28,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:28,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:13:28,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050756401] [2020-10-13 23:13:28,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:13:28,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:28,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:13:28,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:13:28,949 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 27 states. [2020-10-13 23:13:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:30,200 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2020-10-13 23:13:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:13:30,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-10-13 23:13:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:30,203 INFO L225 Difference]: With dead ends: 259 [2020-10-13 23:13:30,203 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 23:13:30,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:13:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 23:13:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 112. [2020-10-13 23:13:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:13:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-13 23:13:30,213 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 103 [2020-10-13 23:13:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:30,213 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-13 23:13:30,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:13:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-13 23:13:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:13:30,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:30,215 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:30,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:13:30,215 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1276814674, now seen corresponding path program 24 times [2020-10-13 23:13:30,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:30,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622087736] [2020-10-13 23:13:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:30,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:35,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:35,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 23:13:35,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:35,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:35,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:35,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:35,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:35,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:13:35,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:35,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:35,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 23:13:35,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622087736] [2020-10-13 23:13:35,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:35,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:13:35,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344233614] [2020-10-13 23:13:35,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:13:35,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:13:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:13:35,731 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 28 states. [2020-10-13 23:13:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:37,113 INFO L93 Difference]: Finished difference Result 269 states and 297 transitions. [2020-10-13 23:13:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:13:37,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-10-13 23:13:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:37,115 INFO L225 Difference]: With dead ends: 269 [2020-10-13 23:13:37,116 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 23:13:37,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=951, Invalid=1599, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 23:13:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 23:13:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 116. [2020-10-13 23:13:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:13:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-13 23:13:37,127 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 107 [2020-10-13 23:13:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:37,127 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-13 23:13:37,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:13:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-13 23:13:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:13:37,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:37,128 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:37,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:13:37,129 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:37,129 INFO L82 PathProgramCache]: Analyzing trace with hash 109874638, now seen corresponding path program 25 times [2020-10-13 23:13:37,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:37,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384727323] [2020-10-13 23:13:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:41,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:42,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:42,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:13:42,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:13:42,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:13:42,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:42,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:42,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:13:42,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:42,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 23:13:42,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:42,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:42,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:42,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:42,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 23:13:42,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384727323] [2020-10-13 23:13:42,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:42,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:13:42,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771650534] [2020-10-13 23:13:42,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:13:42,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:42,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:13:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:13:42,699 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 29 states. [2020-10-13 23:13:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:44,109 INFO L93 Difference]: Finished difference Result 279 states and 308 transitions. [2020-10-13 23:13:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:13:44,110 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 111 [2020-10-13 23:13:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:44,112 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:13:44,112 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 23:13:44,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1028, Invalid=1728, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:13:44,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 23:13:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 120. [2020-10-13 23:13:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:13:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-13 23:13:44,123 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2020-10-13 23:13:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:44,124 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-13 23:13:44,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:13:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-13 23:13:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:13:44,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:44,125 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:44,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:13:44,125 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash 880986186, now seen corresponding path program 26 times [2020-10-13 23:13:44,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:44,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433334169] [2020-10-13 23:13:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:13:49,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:49,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:49,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:49,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:49,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:49,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:49,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:49,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:49,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 23:13:49,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433334169] [2020-10-13 23:13:49,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:49,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:13:49,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449159966] [2020-10-13 23:13:49,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:13:49,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:13:49,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:13:49,665 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 29 states. [2020-10-13 23:13:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:49,850 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-10-13 23:13:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:13:49,851 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-13 23:13:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:49,852 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:13:49,852 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 23:13:49,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:13:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 23:13:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 23:13:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:13:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-13 23:13:49,861 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-13 23:13:49,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:49,861 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-13 23:13:49,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:13:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-13 23:13:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:13:49,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:49,863 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:49,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:13:49,863 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash -252230040, now seen corresponding path program 27 times [2020-10-13 23:13:49,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:49,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228168264] [2020-10-13 23:13:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:54,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:54,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:13:54,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:54,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 23:13:54,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:54,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:54,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:13:54,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:13:54,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:13:54,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:13:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:13:55,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:13:55,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:13:55,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:13:55,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:13:55,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:13:55,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:13:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:13:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:13:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:13:55,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:13:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 23:13:55,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228168264] [2020-10-13 23:13:55,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:13:55,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:13:55,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317759428] [2020-10-13 23:13:55,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:13:55,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:13:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:13:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:13:55,472 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 30 states. [2020-10-13 23:13:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:13:55,837 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-10-13 23:13:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:13:55,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2020-10-13 23:13:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:13:55,838 INFO L225 Difference]: With dead ends: 188 [2020-10-13 23:13:55,839 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:13:55,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:13:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:13:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 23:13:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:13:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-13 23:13:55,849 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-13 23:13:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:13:55,849 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-13 23:13:55,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:13:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-13 23:13:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:13:55,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:13:55,851 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:13:55,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:13:55,851 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:13:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:13:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1648669958, now seen corresponding path program 28 times [2020-10-13 23:13:55,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:13:55,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776440778] [2020-10-13 23:13:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:13:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:13:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:04,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8698 [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:14:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:04,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:14:04,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:05,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:05,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 23:14:05,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776440778] [2020-10-13 23:14:05,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:05,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:14:05,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890034909] [2020-10-13 23:14:05,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:14:05,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:14:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:14:05,164 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 31 states. [2020-10-13 23:14:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:05,560 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-10-13 23:14:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:14:05,560 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 119 [2020-10-13 23:14:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:05,562 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:14:05,562 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:14:05,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:14:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:14:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-13 23:14:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:14:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-13 23:14:05,574 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-13 23:14:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:05,574 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-13 23:14:05,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:14:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-13 23:14:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 23:14:05,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:05,576 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:05,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:14:05,576 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1242500060, now seen corresponding path program 29 times [2020-10-13 23:14:05,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:05,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161503228] [2020-10-13 23:14:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:11,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:11,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 23:14:11,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:14:11,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5993 [2020-10-13 23:14:11,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:11,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:14:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 23:14:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:12,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:12,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:12,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:12,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:12,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:12,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:12,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:12,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:12,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:12,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:14:12,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161503228] [2020-10-13 23:14:12,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:12,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:14:12,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490358820] [2020-10-13 23:14:12,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:14:12,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:14:12,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:14:12,295 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 30 states. [2020-10-13 23:14:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:13,978 INFO L93 Difference]: Finished difference Result 240 states and 268 transitions. [2020-10-13 23:14:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:14:13,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2020-10-13 23:14:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:13,984 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:14:13,984 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 23:14:13,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1108, Invalid=1862, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 23:14:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 23:14:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 128. [2020-10-13 23:14:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:14:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-13 23:14:14,001 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 121 [2020-10-13 23:14:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:14,002 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-13 23:14:14,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:14:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-13 23:14:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:14:14,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:14,003 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:14,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:14:14,008 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash -11697278, now seen corresponding path program 30 times [2020-10-13 23:14:14,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:14,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804945418] [2020-10-13 23:14:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:14,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:19,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:14:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:14:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-13 23:14:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:19,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:14:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:14:19,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:14:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:14:19,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:14:19,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:14:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:14:19,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804945418] [2020-10-13 23:14:19,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:14:19,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:14:19,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458770625] [2020-10-13 23:14:19,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:14:19,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:14:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:14:19,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:14:19,702 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 31 states. [2020-10-13 23:14:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:14:21,231 INFO L93 Difference]: Finished difference Result 246 states and 275 transitions. [2020-10-13 23:14:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:14:21,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 123 [2020-10-13 23:14:21,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:14:21,234 INFO L225 Difference]: With dead ends: 246 [2020-10-13 23:14:21,234 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 23:14:21,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:14:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 23:14:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 130. [2020-10-13 23:14:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:14:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-13 23:14:21,245 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-13 23:14:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:14:21,246 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-13 23:14:21,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:14:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-13 23:14:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:14:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:14:21,247 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:14:21,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:14:21,247 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:14:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:14:21,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1673769824, now seen corresponding path program 31 times [2020-10-13 23:14:21,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:14:21,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486946095] [2020-10-13 23:14:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:14:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:14:21,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking...