/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:01:10,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:01:10,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:01:10,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:01:10,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:01:10,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:01:10,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:01:10,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:01:10,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:01:10,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:01:10,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:01:10,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:01:10,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:01:10,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:01:10,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:01:10,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:01:10,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:01:10,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:01:10,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:01:10,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:01:10,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:01:10,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:01:10,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:01:10,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:01:10,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:01:10,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:01:10,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:01:10,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:01:10,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:01:10,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:01:10,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:01:10,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:01:10,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:01:10,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:01:10,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:01:10,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:01:10,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:01:10,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:01:10,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:01:10,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:01:10,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:01:10,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 08:01:10,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:01:10,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:01:10,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:01:10,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:01:10,798 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:01:10,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:01:10,799 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:01:10,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:01:10,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:01:10,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:01:10,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:01:10,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:01:10,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:01:10,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:01:10,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:01:10,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:01:10,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:01:10,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:01:10,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:01:10,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:01:10,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:01:10,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:01:10,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:01:10,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:01:10,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:01:10,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:01:10,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:01:10,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:01:10,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:01:10,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:01:11,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:01:11,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:01:11,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:01:11,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:01:11,282 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:01:11,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 08:01:11,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e857852b4/3c6aa377b1464d839e15295277f0cd4c/FLAGe84878a6a [2020-09-25 08:01:11,938 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:01:11,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 08:01:11,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e857852b4/3c6aa377b1464d839e15295277f0cd4c/FLAGe84878a6a [2020-09-25 08:01:12,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e857852b4/3c6aa377b1464d839e15295277f0cd4c [2020-09-25 08:01:12,282 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:01:12,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:01:12,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:12,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:01:12,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:01:12,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a48f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12, skipping insertion in model container [2020-09-25 08:01:12,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:01:12,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:01:12,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:12,574 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:01:12,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:12,623 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:01:12,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12 WrapperNode [2020-09-25 08:01:12,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:12,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:01:12,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:01:12,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:01:12,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... [2020-09-25 08:01:12,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:01:12,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:01:12,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:01:12,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:01:12,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:01:12,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:01:12,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:01:12,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:01:12,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:01:12,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:01:12,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:01:12,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:01:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 08:01:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 08:01:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:01:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:01:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:01:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:01:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:01:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:01:12,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:01:13,211 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:01:13,211 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 08:01:13,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:13 BoogieIcfgContainer [2020-09-25 08:01:13,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:01:13,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:01:13,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:01:13,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:01:13,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:01:12" (1/3) ... [2020-09-25 08:01:13,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53cd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:13, skipping insertion in model container [2020-09-25 08:01:13,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:12" (2/3) ... [2020-09-25 08:01:13,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53cd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:13, skipping insertion in model container [2020-09-25 08:01:13,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:13" (3/3) ... [2020-09-25 08:01:13,226 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 08:01:13,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:01:13,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:01:13,264 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:01:13,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:01:13,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:01:13,291 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:01:13,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:01:13,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:01:13,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:01:13,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:01:13,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:01:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 08:01:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 08:01:13,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:13,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:13,323 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 08:01:13,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:13,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613319152] [2020-09-25 08:01:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:13,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:13,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:14,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:14,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:01:14,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:01:14,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-09-25 08:01:14,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:14,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:14,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 08:01:14,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:14,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:01:14,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:14,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:14,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:14,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:14,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:01:14,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:14,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:14,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:14,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:14,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:14,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:14,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613319152] [2020-09-25 08:01:14,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:14,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 08:01:14,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198599678] [2020-09-25 08:01:14,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 08:01:14,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 08:01:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:01:14,417 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-25 08:01:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:14,607 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-25 08:01:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 08:01:14,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 08:01:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:14,621 INFO L225 Difference]: With dead ends: 121 [2020-09-25 08:01:14,621 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 08:01:14,625 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 [2020-09-25 08:01:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 08:01:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-25 08:01:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 08:01:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 08:01:14,673 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-25 08:01:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:14,674 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 08:01:14,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 08:01:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 08:01:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 08:01:14,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:14,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:14,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:01:14,678 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-25 08:01:14,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:14,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302317851] [2020-09-25 08:01:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:14,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:14,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:15,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:15,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:01:15,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 08:01:15,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-09-25 08:01:15,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:15,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:15,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:01:15,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:01:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 08:01:15,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:01:15,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:15,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:15,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:15,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:01:15,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:15,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:15,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:15,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302317851] [2020-09-25 08:01:15,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:15,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:01:15,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199286488] [2020-09-25 08:01:15,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:01:15,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:15,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:01:15,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:01:15,274 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-25 08:01:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:15,508 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-25 08:01:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:01:15,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 08:01:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:15,513 INFO L225 Difference]: With dead ends: 95 [2020-09-25 08:01:15,513 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 08:01:15,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:01:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 08:01:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 08:01:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 08:01:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 08:01:15,534 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 08:01:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:15,534 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 08:01:15,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:01:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 08:01:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 08:01:15,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:15,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:15,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:01:15,537 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 08:01:15,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:15,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855891305] [2020-09-25 08:01:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:16,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:16,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:17,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:17,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 08:01:17,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 08:01:17,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1856 [2020-09-25 08:01:17,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:17,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:17,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:01:17,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 08:01:17,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 08:01:17,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:17,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:17,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:17,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:17,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:17,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:01:17,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:17,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:17,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:17,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:01:17,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855891305] [2020-09-25 08:01:17,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:17,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 08:01:17,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261122555] [2020-09-25 08:01:17,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:01:17,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:01:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:01:17,490 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 6 states. [2020-09-25 08:01:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:17,777 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-09-25 08:01:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 08:01:17,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 08:01:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:17,781 INFO L225 Difference]: With dead ends: 118 [2020-09-25 08:01:17,782 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 08:01:17,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:01:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 08:01:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-25 08:01:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 08:01:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-25 08:01:17,804 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-25 08:01:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:17,805 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-25 08:01:17,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:01:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-25 08:01:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 08:01:17,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:17,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:17,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:01:17,810 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-25 08:01:17,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:17,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614796358] [2020-09-25 08:01:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:17,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:18,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:20,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:20,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 08:01:22,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:01:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:01:22,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 08:01:22,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:01:22,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 08:01:22,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:23,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:23,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:23,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:23,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:23,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:01:23,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:23,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:01:23,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614796358] [2020-09-25 08:01:23,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:23,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 08:01:23,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300448566] [2020-09-25 08:01:23,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 08:01:23,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 08:01:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 08:01:23,441 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-25 08:01:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:24,709 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-09-25 08:01:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 08:01:24,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-25 08:01:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:24,712 INFO L225 Difference]: With dead ends: 113 [2020-09-25 08:01:24,712 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 08:01:24,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 08:01:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 08:01:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2020-09-25 08:01:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 08:01:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-09-25 08:01:24,737 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 48 [2020-09-25 08:01:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:24,738 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-09-25 08:01:24,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 08:01:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-09-25 08:01:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 08:01:24,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:24,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:24,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:01:24,743 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 2 times [2020-09-25 08:01:24,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:24,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129090825] [2020-09-25 08:01:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:24,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:25,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:26,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:27,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:28,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:29,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:29,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:01:29,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 08:01:29,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:01:29,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:29,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 08:01:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 08:01:29,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:29,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:29,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:29,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:29,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 08:01:29,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:29,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:29,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:01:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:29,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129090825] [2020-09-25 08:01:29,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:29,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:01:29,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651209035] [2020-09-25 08:01:29,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:01:29,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:01:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:01:29,891 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 10 states. [2020-09-25 08:01:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:30,190 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-09-25 08:01:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 08:01:30,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-25 08:01:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:30,196 INFO L225 Difference]: With dead ends: 171 [2020-09-25 08:01:30,196 INFO L226 Difference]: Without dead ends: 141 [2020-09-25 08:01:30,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 08:01:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-25 08:01:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 100. [2020-09-25 08:01:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 08:01:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-25 08:01:30,222 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 58 [2020-09-25 08:01:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:30,223 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-25 08:01:30,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:01:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-25 08:01:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 08:01:30,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:30,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:30,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:01:30,227 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:30,227 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 08:01:30,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:30,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205630488] [2020-09-25 08:01:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:30,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:32,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:32,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 08:01:32,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:32,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1780 [2020-09-25 08:01:32,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:32,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 08:01:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 08:01:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:01:32,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:32,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:32,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:32,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:32,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:32,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:01:32,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:32,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:32,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:32,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:32,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:32,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:01:32,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 08:01:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:32,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:32,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:01:32,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:32,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 08:01:32,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:32,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:01:32,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:32,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:01:32,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:01:32,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205630488] [2020-09-25 08:01:32,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:32,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:01:32,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992340364] [2020-09-25 08:01:32,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:01:32,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:01:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:01:32,172 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-25 08:01:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:32,457 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2020-09-25 08:01:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 08:01:32,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 08:01:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:32,459 INFO L225 Difference]: With dead ends: 149 [2020-09-25 08:01:32,459 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 08:01:32,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:01:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 08:01:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2020-09-25 08:01:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 08:01:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-09-25 08:01:32,478 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 64 [2020-09-25 08:01:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:32,478 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-09-25 08:01:32,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:01:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-09-25 08:01:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 08:01:32,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:32,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:32,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:01:32,483 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 3 times [2020-09-25 08:01:32,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:32,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727165411] [2020-09-25 08:01:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:32,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:33,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:33,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:35,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:36,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:37,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:37,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 08:01:37,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 08:01:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 08:01:37,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:37,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 08:01:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:01:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 08:01:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 08:01:38,199 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-09-25 08:01:38,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:38,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:38,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:38,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:38,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:38,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:01:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:38,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:38,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:38,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727165411] [2020-09-25 08:01:38,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:38,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 08:01:38,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37746961] [2020-09-25 08:01:38,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 08:01:38,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 08:01:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-09-25 08:01:38,432 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 23 states. [2020-09-25 08:01:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:40,238 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-09-25 08:01:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 08:01:40,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-09-25 08:01:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:40,240 INFO L225 Difference]: With dead ends: 207 [2020-09-25 08:01:40,241 INFO L226 Difference]: Without dead ends: 205 [2020-09-25 08:01:40,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2020-09-25 08:01:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-25 08:01:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 107. [2020-09-25 08:01:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 08:01:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 08:01:40,259 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 65 [2020-09-25 08:01:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:40,261 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 08:01:40,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 08:01:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 08:01:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 08:01:40,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:40,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:40,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:01:40,269 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1059036540, now seen corresponding path program 2 times [2020-09-25 08:01:40,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:40,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108773971] [2020-09-25 08:01:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:42,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:42,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 08:01:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1751 [2020-09-25 08:01:42,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:42,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 08:01:42,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 08:01:42,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:42,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:42,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:42,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:42,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:42,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:42,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:42,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:42,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:42,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:42,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:42,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:42,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 08:01:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:42,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:42,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:01:42,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:42,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:01:42,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:42,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:01:42,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:42,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:01:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:01:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 08:01:42,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108773971] [2020-09-25 08:01:42,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:42,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 08:01:42,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757902947] [2020-09-25 08:01:42,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 08:01:42,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 08:01:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:01:42,135 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 9 states. [2020-09-25 08:01:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:42,408 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2020-09-25 08:01:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:01:42,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-09-25 08:01:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:42,410 INFO L225 Difference]: With dead ends: 158 [2020-09-25 08:01:42,410 INFO L226 Difference]: Without dead ends: 125 [2020-09-25 08:01:42,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:01:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-25 08:01:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-09-25 08:01:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 08:01:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-25 08:01:42,425 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 71 [2020-09-25 08:01:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:42,425 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-25 08:01:42,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 08:01:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-25 08:01:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 08:01:42,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:42,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:42,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:01:42,428 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 4 times [2020-09-25 08:01:42,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:42,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255968555] [2020-09-25 08:01:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:42,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:42,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:44,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:46,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:47,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:47,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 08:01:47,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:01:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 08:01:47,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:47,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 08:01:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 08:01:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 08:01:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:47,866 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-09-25 08:01:48,008 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2020-09-25 08:01:48,156 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2020-09-25 08:01:48,424 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-09-25 08:01:48,609 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-09-25 08:01:48,815 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-09-25 08:01:49,038 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-09-25 08:01:49,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:49,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:49,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:49,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:49,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:49,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:49,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:01:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 08:01:49,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255968555] [2020-09-25 08:01:49,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:49,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 08:01:49,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225273071] [2020-09-25 08:01:49,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 08:01:49,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 08:01:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-09-25 08:01:49,385 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 23 states. [2020-09-25 08:01:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:51,095 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2020-09-25 08:01:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 08:01:51,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-09-25 08:01:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:51,098 INFO L225 Difference]: With dead ends: 169 [2020-09-25 08:01:51,099 INFO L226 Difference]: Without dead ends: 167 [2020-09-25 08:01:51,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 08:01:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-25 08:01:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2020-09-25 08:01:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 08:01:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-09-25 08:01:51,107 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 72 [2020-09-25 08:01:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:51,107 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-09-25 08:01:51,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 08:01:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-09-25 08:01:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 08:01:51,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:51,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:51,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:01:51,109 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 5 times [2020-09-25 08:01:51,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:51,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039173236] [2020-09-25 08:01:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:51,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:51,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:51,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:56,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:56,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 08:01:56,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:01:56,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 08:01:56,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:56,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:56,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 08:01:56,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 08:01:56,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 08:01:56,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:56,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:56,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:56,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:56,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:56,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:01:56,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:56,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:56,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:56,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:56,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:56,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:01:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 08:01:56,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039173236] [2020-09-25 08:01:56,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:56,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 08:01:56,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138610106] [2020-09-25 08:01:56,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 08:01:56,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 08:01:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-09-25 08:01:56,582 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 22 states.