/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/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:01:16,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:01:16,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:01:16,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:01:16,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:01:16,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:01:16,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:01:16,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:01:16,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:01:16,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:01:16,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:01:16,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:01:16,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:01:16,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:01:16,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:01:16,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:01:16,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:01:16,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:01:16,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:01:16,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:01:16,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:01:16,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:01:16,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:01:16,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:01:16,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:01:16,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:01:16,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:01:16,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:01:16,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:01:16,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:01:16,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:01:16,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:01:16,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:01:16,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:01:16,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:01:16,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:01:16,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:01:16,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:01:16,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:01:16,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:01:16,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:01:16,539 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 08:01:16,565 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:01:16,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:01:16,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:01:16,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:01:16,567 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:01:16,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:01:16,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:01:16,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:01:16,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:01:16,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:01:16,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:01:16,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:01:16,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:01:16,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:01:16,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:01:16,569 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:01:16,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:01:16,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:01:16,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:01:16,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:01:16,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:01:16,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:01:16,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:01:16,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:01:16,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:01:16,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:01:16,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:01:16,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:01:16,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:01:16,572 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 08:01:17,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:01:17,037 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:01:17,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:01:17,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:01:17,043 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:01:17,045 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-25 08:01:17,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaba5c380/17034cdb141d4f1b8c4f6400896ae3cb/FLAGf7ed9feb5 [2020-09-25 08:01:17,658 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:01:17,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-25 08:01:17,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaba5c380/17034cdb141d4f1b8c4f6400896ae3cb/FLAGf7ed9feb5 [2020-09-25 08:01:17,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaba5c380/17034cdb141d4f1b8c4f6400896ae3cb [2020-09-25 08:01:18,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:01:18,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:01:18,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:18,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:01:18,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:01:18,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:17" (1/1) ... [2020-09-25 08:01:18,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccc0ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18, skipping insertion in model container [2020-09-25 08:01:18,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:17" (1/1) ... [2020-09-25 08:01:18,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:01:18,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:01:18,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:18,324 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:01:18,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:18,389 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:01:18,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18 WrapperNode [2020-09-25 08:01:18,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:18,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:01:18,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:01:18,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:01:18,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (1/1) ... [2020-09-25 08:01:18,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:01:18,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:01:18,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:01:18,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:01:18,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (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 08:01:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:01:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:01:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:01:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:01:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:01:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:01:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:01:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 08:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:01:18,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:01:18,995 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 08:01:19,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:19 BoogieIcfgContainer [2020-09-25 08:01:19,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:01:19,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:01:19,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:01:19,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:01:19,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:01:17" (1/3) ... [2020-09-25 08:01:19,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24660e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:19, skipping insertion in model container [2020-09-25 08:01:19,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:18" (2/3) ... [2020-09-25 08:01:19,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24660e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:19, skipping insertion in model container [2020-09-25 08:01:19,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:19" (3/3) ... [2020-09-25 08:01:19,012 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-25 08:01:19,023 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:01:19,035 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:01:19,055 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:01:19,083 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:01:19,084 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:01:19,084 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:01:19,084 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:01:19,084 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:01:19,084 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:01:19,084 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:01:19,084 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:01:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 08:01:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 08:01:19,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:19,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:19,122 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 08:01:19,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:19,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102589316] [2020-09-25 08:01:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:19,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:19,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 08:01:19,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:01:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-09-25 08:01:19,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:19,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:19,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:19,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 08:01:19,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:19,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:01:19,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:19,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:19,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:19,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:19,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:01:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:19,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:19,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:19,731 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 08:01:19,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102589316] [2020-09-25 08:01:19,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:19,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 08:01:19,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105283473] [2020-09-25 08:01:19,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 08:01:19,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 08:01:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:01:19,767 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 08:01:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:20,023 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 08:01:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 08:01:20,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 08:01:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:20,037 INFO L225 Difference]: With dead ends: 188 [2020-09-25 08:01:20,038 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 08:01:20,043 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 08:01:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 08:01:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 08:01:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 08:01:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 08:01:20,100 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 08:01:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:20,100 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 08:01:20,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 08:01:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 08:01:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 08:01:20,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:20,103 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 08:01:20,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:01:20,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 08:01:20,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:20,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601781826] [2020-09-25 08:01:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:20,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:20,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:20,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:20,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 08:01:20,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:20,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-09-25 08:01:20,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:20,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:01:20,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 08:01:20,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 08:01:20,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:01:20,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:20,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:20,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:20,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:20,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:20,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:01:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:20,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:20,433 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 08:01:20,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601781826] [2020-09-25 08:01:20,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:20,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:01:20,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273229281] [2020-09-25 08:01:20,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:01:20,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:20,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:01:20,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:01:20,438 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 08:01:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:20,597 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 08:01:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:01:20,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 08:01:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:20,600 INFO L225 Difference]: With dead ends: 144 [2020-09-25 08:01:20,600 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 08:01:20,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:01:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 08:01:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 08:01:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 08:01:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 08:01:20,612 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 08:01:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:20,613 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 08:01:20,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:01:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 08:01:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 08:01:20,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:20,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:20,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:01:20,616 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 08:01:20,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:20,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042277961] [2020-09-25 08:01:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:20,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:21,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 08:01:21,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-09-25 08:01:21,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:21,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:01:21,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 08:01:21,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 08:01:21,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:21,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:21,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:21,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:21,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:21,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:01:21,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:21,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:21,410 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 08:01:21,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042277961] [2020-09-25 08:01:21,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:21,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 08:01:21,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032201362] [2020-09-25 08:01:21,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:01:21,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:01:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:01:21,414 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 08:01:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:21,621 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-09-25 08:01:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 08:01:21,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 08:01:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:21,623 INFO L225 Difference]: With dead ends: 152 [2020-09-25 08:01:21,623 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 08:01:21,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 08:01:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 08:01:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 08:01:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 08:01:21,633 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 08:01:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:21,634 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 08:01:21,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:01:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 08:01:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 08:01:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:21,635 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-25 08:01:21,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:01:21,636 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1958895614, now seen corresponding path program 2 times [2020-09-25 08:01:21,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:21,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791484480] [2020-09-25 08:01:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:21,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:21,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 08:01:22,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-09-25 08:01:22,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:01:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 08:01:22,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 08:01:22,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:01:22,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:22,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:22,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:22,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:01:22,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:22,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:22,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:01:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:01:22,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791484480] [2020-09-25 08:01:22,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:22,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 08:01:22,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838849111] [2020-09-25 08:01:22,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 08:01:22,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 08:01:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:22,617 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-25 08:01:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:22,896 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2020-09-25 08:01:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 08:01:22,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-25 08:01:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:22,898 INFO L225 Difference]: With dead ends: 159 [2020-09-25 08:01:22,898 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 08:01:22,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:01:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 08:01:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-25 08:01:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 08:01:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 08:01:22,908 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 08:01:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:22,908 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 08:01:22,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 08:01:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 08:01:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 08:01:22,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:22,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:22,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:01:22,910 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash -699729223, now seen corresponding path program 3 times [2020-09-25 08:01:22,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:22,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739726738] [2020-09-25 08:01:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:22,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:24,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 08:01:24,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:24,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-09-25 08:01:24,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:24,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:01:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 08:01:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 08:01:24,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:24,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:24,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:24,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:24,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:24,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 08:01:24,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739726738] [2020-09-25 08:01:24,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:24,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 08:01:24,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004470547] [2020-09-25 08:01:24,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:01:24,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:01:24,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:01:24,133 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 6 states. [2020-09-25 08:01:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:24,315 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2020-09-25 08:01:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 08:01:24,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-09-25 08:01:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:24,317 INFO L225 Difference]: With dead ends: 149 [2020-09-25 08:01:24,317 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 08:01:24,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 08:01:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-09-25 08:01:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 08:01:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 08:01:24,326 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 08:01:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:24,327 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 08:01:24,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:01:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 08:01:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 08:01:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:24,329 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:24,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:01:24,329 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1399032013, now seen corresponding path program 4 times [2020-09-25 08:01:24,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:24,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516124027] [2020-09-25 08:01:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:24,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:26,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:26,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 08:01:26,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:26,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2064 [2020-09-25 08:01:26,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:26,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:26,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:26,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 08:01:26,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 08:01:26,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:26,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:26,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:26,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:26,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:26,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:26,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:26,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:26,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:26,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:26,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:26,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 08:01:26,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516124027] [2020-09-25 08:01:26,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:26,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:01:26,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966482612] [2020-09-25 08:01:26,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:01:26,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:26,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:01:26,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:01:26,576 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 10 states. [2020-09-25 08:01:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:26,811 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-09-25 08:01:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:01:26,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-09-25 08:01:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:26,813 INFO L225 Difference]: With dead ends: 175 [2020-09-25 08:01:26,813 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 08:01:26,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:01:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 08:01:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 08:01:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 08:01:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 08:01:26,832 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 08:01:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:26,832 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 08:01:26,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:01:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 08:01:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 08:01:26,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:26,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2020-09-25 08:01:26,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:01:26,834 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1633037998, now seen corresponding path program 5 times [2020-09-25 08:01:26,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:26,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928862403] [2020-09-25 08:01:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:26,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:29,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:29,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 08:01:29,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:29,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2385 [2020-09-25 08:01:29,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:29,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:01:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 08:01:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 08:01:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:29,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:29,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:29,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:29,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:29,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:29,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:29,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:29,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:29,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:29,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 08:01:29,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928862403] [2020-09-25 08:01:29,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:29,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 08:01:29,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118479667] [2020-09-25 08:01:29,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 08:01:29,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 08:01:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:01:29,366 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 12 states. [2020-09-25 08:01:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:29,639 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2020-09-25 08:01:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 08:01:29,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-09-25 08:01:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:29,641 INFO L225 Difference]: With dead ends: 177 [2020-09-25 08:01:29,641 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 08:01:29,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 08:01:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 08:01:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-09-25 08:01:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 08:01:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-25 08:01:29,649 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-25 08:01:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:29,650 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-25 08:01:29,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 08:01:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-25 08:01:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 08:01:29,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:29,651 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2020-09-25 08:01:29,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:01:29,652 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2059478739, now seen corresponding path program 6 times [2020-09-25 08:01:29,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:29,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439806685] [2020-09-25 08:01:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:29,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:29,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 08:01:29,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:29,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-09-25 08:01:29,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:29,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:01:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 08:01:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 08:01:29,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:30,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:30,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:30,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:30,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:30,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:30,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:30,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:30,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:30,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:30,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 08:01:30,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439806685] [2020-09-25 08:01:30,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:30,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 08:01:30,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49998966] [2020-09-25 08:01:30,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 08:01:30,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 08:01:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:30,024 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-25 08:01:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:30,245 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-25 08:01:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 08:01:30,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-25 08:01:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:30,247 INFO L225 Difference]: With dead ends: 170 [2020-09-25 08:01:30,247 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 08:01:30,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:01:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 08:01:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-25 08:01:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 08:01:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-25 08:01:30,255 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-25 08:01:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:30,256 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-25 08:01:30,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 08:01:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-25 08:01:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-25 08:01:30,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:30,257 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:30,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:01:30,257 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:30,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2012961241, now seen corresponding path program 7 times [2020-09-25 08:01:30,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:30,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758775139] [2020-09-25 08:01:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:30,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:30,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 08:01:30,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:30,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-09-25 08:01:30,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:30,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:30,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 08:01:30,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 08:01:30,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:30,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:30,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:30,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:30,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:30,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:01:30,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:30,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:30,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 08:01:30,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758775139] [2020-09-25 08:01:30,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:30,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:01:30,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741992822] [2020-09-25 08:01:30,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:01:30,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:30,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:01:30,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:01:30,757 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-25 08:01:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:30,975 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-09-25 08:01:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:01:30,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-25 08:01:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:30,977 INFO L225 Difference]: With dead ends: 177 [2020-09-25 08:01:30,978 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 08:01:30,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:01:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 08:01:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-25 08:01:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 08:01:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-25 08:01:30,985 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-25 08:01:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:30,985 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-25 08:01:30,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:01:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-25 08:01:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 08:01:30,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:30,987 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:30,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:01:30,987 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-25 08:01:30,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:30,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700795693] [2020-09-25 08:01:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:31,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:31,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:31,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 08:01:31,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:31,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-09-25 08:01:31,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:31,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:01:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 08:01:31,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 08:01:31,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:31,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:31,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:31,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:01:31,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:31,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:01:31,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:31,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:31,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 08:01:31,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700795693] [2020-09-25 08:01:31,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:31,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 08:01:31,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117705789] [2020-09-25 08:01:31,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 08:01:31,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 08:01:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:01:31,587 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-25 08:01:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:31,884 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-25 08:01:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 08:01:31,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 08:01:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:31,886 INFO L225 Difference]: With dead ends: 179 [2020-09-25 08:01:31,886 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 08:01:31,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 08:01:31,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 08:01:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-25 08:01:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 08:01:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-25 08:01:31,895 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-25 08:01:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:31,896 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-25 08:01:31,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 08:01:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-25 08:01:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 08:01:31,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:31,900 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:31,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 08:01:31,901 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-25 08:01:31,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:31,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824702833] [2020-09-25 08:01:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:01:31,928 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:01:31,929 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:01:31,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 08:01:31,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:01:31 BoogieIcfgContainer [2020-09-25 08:01:31,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:01:31,994 INFO L168 Benchmark]: Toolchain (without parser) took 13989.87 ms. Allocated memory was 148.4 MB in the beginning and 332.4 MB in the end (delta: 184.0 MB). Free memory was 104.7 MB in the beginning and 285.3 MB in the end (delta: -180.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:31,995 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 08:01:31,999 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.30 ms. Allocated memory is still 148.4 MB. Free memory was 104.0 MB in the beginning and 93.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:32,000 INFO L168 Benchmark]: Boogie Preprocessor took 152.38 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 182.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:32,000 INFO L168 Benchmark]: RCFGBuilder took 457.53 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 156.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:32,001 INFO L168 Benchmark]: TraceAbstraction took 12987.38 ms. Allocated memory was 205.0 MB in the beginning and 332.4 MB in the end (delta: 127.4 MB). Free memory was 156.9 MB in the beginning and 285.3 MB in the end (delta: -128.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 08:01:32,013 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 383.30 ms. Allocated memory is still 148.4 MB. Free memory was 104.0 MB in the beginning and 93.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.38 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 182.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.53 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 156.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12987.38 ms. Allocated memory was 205.0 MB in the beginning and 332.4 MB in the end (delta: 127.4 MB). Free memory was 156.9 MB in the beginning and 285.3 MB in the end (delta: -128.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND FALSE !(i<5) [L26] EXPR string_A[5 -1] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND FALSE !(i<5) [L30] EXPR string_B[5 -1] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 [L33] EXPR string_A[nc_A] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 [L37] EXPR string_B[nc_B] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 [L44] COND FALSE !((inc_B-1)<