/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:16:53,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:16:53,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:16:53,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:16:53,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:16:53,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:16:53,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:16:53,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:16:53,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:16:53,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:16:53,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:16:53,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:16:53,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:16:53,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:16:53,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:16:53,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:16:53,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:16:53,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:16:53,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:16:53,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:16:53,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:16:53,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:16:53,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:16:53,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:16:53,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:16:53,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:16:53,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:16:53,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:16:53,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:16:53,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:16:53,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:16:53,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:16:53,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:16:53,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:16:53,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:16:53,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:16:53,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:16:53,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:16:53,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:16:53,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:16:53,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:16:53,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:16:53,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:16:53,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:16:53,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:16:53,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:16:53,632 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:16:53,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:16:53,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:16:53,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:16:53,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:16:53,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:16:53,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:16:53,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:16:53,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:16:53,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:16:53,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:16:53,634 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:16:53,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:16:53,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:16:53,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:16:53,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:16:53,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:16:53,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:16:53,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:16:53,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:16:53,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:16:53,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:16:53,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:16:53,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:16:53,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:16:53,637 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:16:53,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:16:53,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:16:53,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:16:53,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:16:53,929 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:16:53,930 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-14 18:16:54,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70ac7a855/3f7fffebeb904c2d89e78c642a539e33/FLAGbf67abe6f [2020-10-14 18:16:54,441 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:16:54,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2020-10-14 18:16:54,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70ac7a855/3f7fffebeb904c2d89e78c642a539e33/FLAGbf67abe6f [2020-10-14 18:16:54,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70ac7a855/3f7fffebeb904c2d89e78c642a539e33 [2020-10-14 18:16:54,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:16:54,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:16:54,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:16:54,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:16:54,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:16:54,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:16:54" (1/1) ... [2020-10-14 18:16:54,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589fe6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:54, skipping insertion in model container [2020-10-14 18:16:54,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:16:54" (1/1) ... [2020-10-14 18:16:54,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:16:54,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:16:55,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:16:56,454 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:16:56,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:16:56,496 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:16:56,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56 WrapperNode [2020-10-14 18:16:56,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:16:56,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:16:56,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:16:56,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:16:56,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... [2020-10-14 18:16:56,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:16:56,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:16:56,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:16:56,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:16:56,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:16:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:16:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:16:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:16:56,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:16:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:16:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:16:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:16:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:16:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:16:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:16:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:16:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:16:56,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:16:56,812 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:16:56,813 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:16:56,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:16:56 BoogieIcfgContainer [2020-10-14 18:16:56,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:16:56,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:16:56,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:16:56,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:16:56,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:16:54" (1/3) ... [2020-10-14 18:16:56,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edc95d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:16:56, skipping insertion in model container [2020-10-14 18:16:56,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:56" (2/3) ... [2020-10-14 18:16:56,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edc95d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:16:56, skipping insertion in model container [2020-10-14 18:16:56,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:16:56" (3/3) ... [2020-10-14 18:16:56,829 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2020-10-14 18:16:56,842 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:16:56,848 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:16:56,864 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:16:56,904 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:16:56,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:16:56,904 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:16:56,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:16:56,905 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:16:56,905 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:16:56,905 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:16:56,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:16:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 18:16:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 18:16:56,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:56,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:56,931 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -423135907, now seen corresponding path program 1 times [2020-10-14 18:16:56,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:56,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521534652] [2020-10-14 18:16:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:16:57,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-14 18:16:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:16:57,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:57,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:16:57,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:57,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 18:16:57,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:57,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:57,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521534652] [2020-10-14 18:16:57,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:16:57,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 18:16:57,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048690823] [2020-10-14 18:16:57,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 18:16:57,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 18:16:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:16:57,319 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-14 18:16:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:57,417 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-14 18:16:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 18:16:57,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 18:16:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:57,428 INFO L225 Difference]: With dead ends: 52 [2020-10-14 18:16:57,428 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 18:16:57,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:16:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 18:16:57,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-14 18:16:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 18:16:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-14 18:16:57,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-10-14 18:16:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:57,473 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-14 18:16:57,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 18:16:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-14 18:16:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 18:16:57,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:57,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:57,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:16:57,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1453190697, now seen corresponding path program 1 times [2020-10-14 18:16:57,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:57,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107073638] [2020-10-14 18:16:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:16:57,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 18:16:57,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:16:57,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:16:57,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:16:57,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:57,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 18:16:57,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:57,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107073638] [2020-10-14 18:16:57,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:16:57,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 18:16:57,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284970265] [2020-10-14 18:16:57,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:16:57,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:57,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:16:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:16:57,707 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-14 18:16:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:57,802 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-14 18:16:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:16:57,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-14 18:16:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:57,804 INFO L225 Difference]: With dead ends: 39 [2020-10-14 18:16:57,804 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 18:16:57,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:16:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 18:16:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-14 18:16:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 18:16:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 18:16:57,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2020-10-14 18:16:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:57,815 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 18:16:57,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:16:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 18:16:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 18:16:57,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:57,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:57,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:16:57,817 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash -769700427, now seen corresponding path program 1 times [2020-10-14 18:16:57,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:57,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285098003] [2020-10-14 18:16:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:58,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:16:58,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:16:58,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-14 18:16:58,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:58,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:16:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:16:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:16:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:16:58,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:58,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:58,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:58,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:58,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 18:16:58,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:58,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:58,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285098003] [2020-10-14 18:16:58,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:58,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:16:58,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263735514] [2020-10-14 18:16:58,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:16:58,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:16:58,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:16:58,372 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-10-14 18:16:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:58,697 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-14 18:16:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:16:58,697 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-14 18:16:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:58,699 INFO L225 Difference]: With dead ends: 44 [2020-10-14 18:16:58,699 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:16:58,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:16:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:16:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2020-10-14 18:16:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:16:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-14 18:16:58,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2020-10-14 18:16:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:58,708 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-14 18:16:58,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:16:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-14 18:16:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:16:58,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:58,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:58,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:16:58,710 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash -714399150, now seen corresponding path program 1 times [2020-10-14 18:16:58,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:58,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262384296] [2020-10-14 18:16:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:59,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:59,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:16:59,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:16:59,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-14 18:16:59,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:59,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:59,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:16:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:16:59,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:16:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:59,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:59,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:59,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:59,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:59,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:16:59,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:59,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:59,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:16:59,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:59,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:16:59,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:59,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 18:16:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:59,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:59,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:59,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:59,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:16:59,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:59,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:59,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:16:59,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:59,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:16:59,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:59,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262384296] [2020-10-14 18:16:59,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:59,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:16:59,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603786050] [2020-10-14 18:16:59,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:16:59,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:16:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:16:59,496 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-10-14 18:17:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:00,241 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-14 18:17:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:17:00,242 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-14 18:17:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:00,243 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:17:00,243 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:17:00,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:17:00,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:17:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 18:17:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 18:17:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-14 18:17:00,250 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-10-14 18:17:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:00,250 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-14 18:17:00,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:17:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-14 18:17:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:17:00,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:00,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:00,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:17:00,252 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:00,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1639477172, now seen corresponding path program 2 times [2020-10-14 18:17:00,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:00,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38149390] [2020-10-14 18:17:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:00,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:00,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:17:00,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:00,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-14 18:17:00,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:00,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:17:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:17:00,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:00,806 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-14 18:17:00,948 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-14 18:17:01,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:01,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:01,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:01,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 18:17:01,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:01,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:01,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:01,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 18:17:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:01,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:01,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:01,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:01,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:01,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:01,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:01,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:01,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38149390] [2020-10-14 18:17:01,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:01,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:17:01,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441364470] [2020-10-14 18:17:01,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:17:01,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:01,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:17:01,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:17:01,182 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2020-10-14 18:17:01,487 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-14 18:17:01,685 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-14 18:17:02,079 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-14 18:17:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:02,635 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-14 18:17:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:17:02,636 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-14 18:17:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:02,637 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:17:02,638 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 18:17:02,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:17:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 18:17:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 18:17:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 18:17:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-14 18:17:02,650 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-14 18:17:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:02,651 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-14 18:17:02,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:17:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-14 18:17:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:17:02,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:02,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:02,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:17:02,656 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash 266857622, now seen corresponding path program 3 times [2020-10-14 18:17:02,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:02,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004109205] [2020-10-14 18:17:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:02,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:02,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:17:02,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:02,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-14 18:17:02,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:02,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:17:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:17:02,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:03,851 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-14 18:17:04,088 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-14 18:17:04,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:04,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:04,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:04,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:04,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:04,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:17:04,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:04,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:04,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:04,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:04,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:04,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:04,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 18:17:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:04,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:04,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:04,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:04,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:04,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:17:04,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:04,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:04,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:04,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004109205] [2020-10-14 18:17:04,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:04,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:17:04,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845656612] [2020-10-14 18:17:04,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:17:04,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:04,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:17:04,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:17:04,283 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-14 18:17:04,913 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-14 18:17:05,241 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-14 18:17:05,509 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-14 18:17:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:06,270 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-14 18:17:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:17:06,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-14 18:17:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:06,272 INFO L225 Difference]: With dead ends: 55 [2020-10-14 18:17:06,272 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 18:17:06,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:17:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 18:17:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 18:17:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:17:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-14 18:17:06,279 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-10-14 18:17:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:06,280 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-14 18:17:06,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:17:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-14 18:17:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:17:06,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:06,281 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:06,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:17:06,281 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash -265570056, now seen corresponding path program 4 times [2020-10-14 18:17:06,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:06,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269291633] [2020-10-14 18:17:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:06,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:06,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:17:06,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:06,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-14 18:17:06,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:06,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:06,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:17:06,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:06,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:17:06,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:07,329 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-14 18:17:07,565 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-14 18:17:08,047 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-14 18:17:08,539 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-14 18:17:09,394 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2020-10-14 18:17:09,823 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-14 18:17:09,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:09,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:17:09,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:09,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:09,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 18:17:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:09,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:09,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:09,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:10,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269291633] [2020-10-14 18:17:10,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:10,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:17:10,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448065977] [2020-10-14 18:17:10,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:17:10,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:17:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:17:10,078 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2020-10-14 18:17:11,216 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-14 18:17:12,010 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-14 18:17:12,532 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-14 18:17:12,948 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-14 18:17:13,331 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 18:17:13,713 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 18:17:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:14,094 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-14 18:17:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:17:14,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-14 18:17:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:14,095 INFO L225 Difference]: With dead ends: 57 [2020-10-14 18:17:14,096 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 18:17:14,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:17:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 18:17:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 18:17:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:17:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 18:17:14,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2020-10-14 18:17:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:14,103 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 18:17:14,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:17:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 18:17:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:17:14,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:14,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:14,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:17:14,105 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash -827460390, now seen corresponding path program 5 times [2020-10-14 18:17:14,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:14,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905599088] [2020-10-14 18:17:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:14,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:14,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:17:14,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 18:17:14,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:14,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:17:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:17:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:16,706 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-14 18:17:16,980 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-14 18:17:17,307 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-14 18:17:17,818 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-14 18:17:18,555 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2020-10-14 18:17:19,772 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 73 [2020-10-14 18:17:21,644 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 85 [2020-10-14 18:17:22,667 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 84 [2020-10-14 18:17:22,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:22,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:22,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:22,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:22,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:22,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:22,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:22,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 18:17:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:22,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:22,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:22,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:17:22,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:22,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:22,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905599088] [2020-10-14 18:17:22,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:22,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:17:22,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203917743] [2020-10-14 18:17:22,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:17:22,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:22,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:17:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:17:22,977 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 19 states. [2020-10-14 18:17:25,850 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-10-14 18:17:29,769 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-14 18:17:31,111 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-14 18:17:32,170 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-14 18:17:33,207 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 18:17:34,271 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-14 18:17:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:34,867 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-14 18:17:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:17:34,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-10-14 18:17:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:34,868 INFO L225 Difference]: With dead ends: 59 [2020-10-14 18:17:34,868 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 18:17:34,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:17:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 18:17:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 18:17:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:17:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-14 18:17:34,877 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 32 [2020-10-14 18:17:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:34,877 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-14 18:17:34,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:17:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-14 18:17:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:17:34,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:34,879 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:34,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:17:34,879 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 361807932, now seen corresponding path program 6 times [2020-10-14 18:17:34,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:34,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176783447] [2020-10-14 18:17:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:34,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:35,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:17:35,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:17:35,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 18:17:35,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:35,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:35,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:17:35,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:35,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:17:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:43,578 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-14 18:17:43,881 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-14 18:17:44,434 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-14 18:17:45,041 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-10-14 18:17:46,148 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2020-10-14 18:17:47,560 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 71 [2020-10-14 18:17:49,914 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 83 [2020-10-14 18:17:53,833 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 170 DAG size of output: 86 [2020-10-14 18:18:00,160 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 216 DAG size of output: 97 [2020-10-14 18:18:03,372 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 199 DAG size of output: 96 [2020-10-14 18:18:03,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:18:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:03,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:03,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:03,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:18:03,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:03,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:18:03,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:03,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:18:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:18:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:18:03,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:03,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 18:18:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:03,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:03,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:03,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:18:03,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:18:03,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 18:18:03,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:03,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:03,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:18:03,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:18:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:18:03,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:18:03,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176783447] [2020-10-14 18:18:03,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:18:03,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:18:03,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899609150] [2020-10-14 18:18:03,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:18:03,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:18:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:18:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:18:03,784 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 21 states. [2020-10-14 18:18:12,511 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 122 DAG size of output: 116 [2020-10-14 18:18:17,917 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2020-10-14 18:18:21,065 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2020-10-14 18:18:23,347 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-14 18:18:27,706 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 117 [2020-10-14 18:18:30,298 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 18:18:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:31,956 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-14 18:18:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:18:31,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-10-14 18:18:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:31,958 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:18:31,958 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 18:18:31,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:18:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 18:18:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 18:18:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:18:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 18:18:31,967 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2020-10-14 18:18:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:31,967 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 18:18:31,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:18:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 18:18:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:18:31,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:31,968 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:31,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:18:31,969 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash 787364638, now seen corresponding path program 7 times [2020-10-14 18:18:31,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:31,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804822327] [2020-10-14 18:18:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:32,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:32,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:18:32,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:18:32,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-14 18:18:32,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:32,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:18:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:18:32,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:18:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:58,710 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-14 18:18:58,993 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-14 18:18:59,471 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-14 18:19:00,251 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-14 18:19:01,339 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-14 18:19:03,045 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-14 18:19:06,124 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-10-14 18:19:10,441 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 140 DAG size of output: 78 [2020-10-14 18:19:16,909 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 180 DAG size of output: 87 [2020-10-14 18:19:27,435 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 183 DAG size of output: 90 [2020-10-14 18:19:40,600 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 229 DAG size of output: 99 [2020-10-14 18:19:46,271 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 181 DAG size of output: 91 [2020-10-14 18:19:46,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:46,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:19:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:46,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 18:19:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:46,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:46,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:46,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:19:46,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:46,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:19:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:19:46,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:19:47,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804822327] [2020-10-14 18:19:47,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:47,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:19:47,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879645548] [2020-10-14 18:19:47,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:19:47,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:19:47,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=355, Unknown=5, NotChecked=0, Total=506 [2020-10-14 18:19:47,188 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 23 states. [2020-10-14 18:20:11,705 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2020-10-14 18:20:24,462 WARN L193 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2020-10-14 18:20:32,021 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 127 DAG size of output: 120 [2020-10-14 18:20:37,915 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 109 [2020-10-14 18:20:44,473 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 18:20:51,240 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 114 [2020-10-14 18:20:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:55,525 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-14 18:20:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:20:55,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-10-14 18:20:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:55,533 INFO L225 Difference]: With dead ends: 63 [2020-10-14 18:20:55,533 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 18:20:55,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 83.0s TimeCoverageRelationStatistics Valid=238, Invalid=813, Unknown=5, NotChecked=0, Total=1056 [2020-10-14 18:20:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 18:20:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 18:20:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 18:20:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-14 18:20:55,541 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2020-10-14 18:20:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:55,542 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-14 18:20:55,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:20:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-14 18:20:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:20:55,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:55,543 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:55,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:20:55,543 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1725465984, now seen corresponding path program 8 times [2020-10-14 18:20:55,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:55,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232956414] [2020-10-14 18:20:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:55,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-14 18:20:56,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:20:56,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0