/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=0.6 --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 06:52:14,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:52:14,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:52:14,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:52:14,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:52:14,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:52:14,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:52:14,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:52:14,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:52:14,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:52:14,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:52:14,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:52:14,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:52:14,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:52:14,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:52:14,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:52:14,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:52:14,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:52:14,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:52:14,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:52:14,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:52:14,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:52:14,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:52:14,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:52:14,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:52:14,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:52:14,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:52:14,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:52:14,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:52:14,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:52:14,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:52:14,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:52:14,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:52:14,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:52:14,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:52:14,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:52:14,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:52:14,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:52:14,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:52:14,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:52:14,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:52:14,443 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 06:52:14,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:52:14,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:52:14,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:52:14,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:52:14,498 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:52:14,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:52:14,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:52:14,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:52:14,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:52:14,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:52:14,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:52:14,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:52:14,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:52:14,501 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:52:14,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:52:14,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:52:14,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:52:14,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:52:14,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:52:14,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:52:14,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:52:14,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:14,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:52:14,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:52:14,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:52:14,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:52:14,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:52:14,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:52:14,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:52:14,504 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=0.6;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=0.6;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=0.6;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=0.6;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=0.6;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=0.6;log-additional-information=true; [2020-09-25 06:52:14,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:52:15,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:52:15,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:52:15,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:52:15,010 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:52:15,011 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-25 06:52:15,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf6690454/2b0c3cf281a941c584f0f481d9886df0/FLAG1eee4ba2d [2020-09-25 06:52:15,641 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:52:15,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-25 06:52:15,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf6690454/2b0c3cf281a941c584f0f481d9886df0/FLAG1eee4ba2d [2020-09-25 06:52:15,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf6690454/2b0c3cf281a941c584f0f481d9886df0 [2020-09-25 06:52:16,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:52:16,018 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:52:16,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:16,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:52:16,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:52:16,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:15" (1/1) ... [2020-09-25 06:52:16,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16, skipping insertion in model container [2020-09-25 06:52:16,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:15" (1/1) ... [2020-09-25 06:52:16,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:52:16,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:52:16,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:16,345 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:52:16,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:16,397 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:52:16,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16 WrapperNode [2020-09-25 06:52:16,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:16,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:52:16,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:52:16,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:52:16,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (1/1) ... [2020-09-25 06:52:16,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:52:16,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:52:16,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:52:16,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:52:16,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (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 06:52:16,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:52:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:52:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:52:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:52:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:52:16,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:52:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:52:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:52:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:52:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:52:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:52:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 06:52:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 06:52:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 06:52:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:52:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:52:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:52:17,086 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:52:17,086 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 06:52:17,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:17 BoogieIcfgContainer [2020-09-25 06:52:17,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:52:17,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:52:17,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:52:17,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:52:17,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:52:15" (1/3) ... [2020-09-25 06:52:17,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4795ae32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:17, skipping insertion in model container [2020-09-25 06:52:17,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:16" (2/3) ... [2020-09-25 06:52:17,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4795ae32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:17, skipping insertion in model container [2020-09-25 06:52:17,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:17" (3/3) ... [2020-09-25 06:52:17,104 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-25 06:52:17,113 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:52:17,124 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:52:17,144 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:52:17,173 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:52:17,173 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:52:17,173 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:52:17,173 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:52:17,173 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:52:17,173 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:52:17,174 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:52:17,174 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:52:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 06:52:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 06:52:17,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:17,208 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 06:52:17,208 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 06:52:17,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:17,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227903651] [2020-09-25 06:52:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:17,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 06:52:17,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:52:17,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-09-25 06:52:17,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:17,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:17,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:17,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 06:52:17,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:17,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:52:17,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:17,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:17,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:17,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:17,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:17,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 06:52:17,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:17,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:17,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:17,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:17,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:17,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:17,827 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 06:52:17,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227903651] [2020-09-25 06:52:17,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:17,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:52:17,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502675572] [2020-09-25 06:52:17,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:52:17,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:52:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:52:17,861 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 06:52:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:18,114 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 06:52:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:52:18,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 06:52:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:18,129 INFO L225 Difference]: With dead ends: 188 [2020-09-25 06:52:18,130 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 06:52:18,135 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 06:52:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 06:52:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 06:52:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 06:52:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 06:52:18,193 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 06:52:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:18,193 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 06:52:18,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:52:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 06:52:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 06:52:18,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:18,196 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 06:52:18,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:52:18,197 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 06:52:18,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:18,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442790311] [2020-09-25 06:52:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:18,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 06:52:18,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:18,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-09-25 06:52:18,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:18,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:52:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 06:52:18,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 06:52:18,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 06:52:18,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:18,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:18,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:18,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:18,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:52:18,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:18,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:18,601 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 06:52:18,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442790311] [2020-09-25 06:52:18,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:18,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:52:18,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824039286] [2020-09-25 06:52:18,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:52:18,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:52:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:52:18,610 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 06:52:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:18,814 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 06:52:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:52:18,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 06:52:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:18,817 INFO L225 Difference]: With dead ends: 144 [2020-09-25 06:52:18,817 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 06:52:18,819 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 06:52:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 06:52:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 06:52:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 06:52:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 06:52:18,831 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 06:52:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:18,831 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 06:52:18,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:52:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 06:52:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 06:52:18,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:18,834 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 06:52:18,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:52:18,835 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 06:52:18,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:18,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964367685] [2020-09-25 06:52:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:18,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:19,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:19,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 06:52:19,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:19,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-09-25 06:52:19,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:19,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:52:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:19,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:19,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:19,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:19,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:52:19,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:19,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:19,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:19,710 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 06:52:19,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964367685] [2020-09-25 06:52:19,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:19,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 06:52:19,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164060619] [2020-09-25 06:52:19,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:19,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:19,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:19,716 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 06:52:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:19,996 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-09-25 06:52:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:52:19,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 06:52:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:20,000 INFO L225 Difference]: With dead ends: 152 [2020-09-25 06:52:20,000 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 06:52:20,002 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 06:52:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 06:52:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 06:52:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 06:52:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 06:52:20,027 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 06:52:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:20,027 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 06:52:20,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 06:52:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 06:52:20,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:20,029 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 06:52:20,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:52:20,030 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1958895614, now seen corresponding path program 2 times [2020-09-25 06:52:20,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:20,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890569080] [2020-09-25 06:52:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:20,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:21,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:21,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 06:52:21,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:21,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-09-25 06:52:21,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:21,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:52:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:52:21,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:21,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:21,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:21,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:21,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:21,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:52:21,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:21,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:21,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:21,086 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 06:52:21,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890569080] [2020-09-25 06:52:21,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:21,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:52:21,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233859830] [2020-09-25 06:52:21,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:52:21,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:52:21,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:21,089 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-25 06:52:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:21,396 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2020-09-25 06:52:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:52:21,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-25 06:52:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:21,398 INFO L225 Difference]: With dead ends: 159 [2020-09-25 06:52:21,399 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 06:52:21,400 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 06:52:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 06:52:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-25 06:52:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 06:52:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 06:52:21,409 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 06:52:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:21,409 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 06:52:21,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:52:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 06:52:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 06:52:21,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:21,411 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 06:52:21,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:52:21,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash -699729223, now seen corresponding path program 3 times [2020-09-25 06:52:21,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:21,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745739744] [2020-09-25 06:52:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:21,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:22,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:22,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 06:52:22,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:22,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-09-25 06:52:22,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:22,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:22,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 06:52:22,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:52:22,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:22,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:22,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:22,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:22,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:22,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:22,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:22,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:22,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:22,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:22,665 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 06:52:22,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745739744] [2020-09-25 06:52:22,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:22,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 06:52:22,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309782548] [2020-09-25 06:52:22,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:22,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:22,668 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 6 states. [2020-09-25 06:52:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:22,888 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2020-09-25 06:52:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:52:22,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-09-25 06:52:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:22,891 INFO L225 Difference]: With dead ends: 149 [2020-09-25 06:52:22,891 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 06:52:22,892 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 06:52:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 06:52:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-09-25 06:52:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 06:52:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 06:52:22,916 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 06:52:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:22,917 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 06:52:22,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 06:52:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 06:52:22,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:22,920 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 06:52:22,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:52:22,920 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1399032013, now seen corresponding path program 4 times [2020-09-25 06:52:22,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:22,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920920097] [2020-09-25 06:52:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:25,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:25,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 06:52:25,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:25,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2070 [2020-09-25 06:52:25,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:25,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:52:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:52:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:25,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:25,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:25,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:25,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:25,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:25,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:52:25,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:25,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:25,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:25,183 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 06:52:25,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920920097] [2020-09-25 06:52:25,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:25,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 06:52:25,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498382169] [2020-09-25 06:52:25,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:52:25,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:25,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:52:25,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:52:25,193 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 10 states. [2020-09-25 06:52:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:25,478 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-09-25 06:52:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:52:25,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-09-25 06:52:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:25,480 INFO L225 Difference]: With dead ends: 175 [2020-09-25 06:52:25,480 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 06:52:25,481 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 06:52:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 06:52:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 06:52:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 06:52:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 06:52:25,501 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 06:52:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:25,502 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 06:52:25,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:52:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 06:52:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 06:52:25,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:25,507 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 06:52:25,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:52:25,507 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1633037998, now seen corresponding path program 5 times [2020-09-25 06:52:25,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:25,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446391114] [2020-09-25 06:52:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:25,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:27,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:27,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 06:52:27,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-09-25 06:52:27,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:27,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:52:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-25 06:52:27,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:52:27,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:28,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:28,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:28,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:28,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:28,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:28,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 06:52:28,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446391114] [2020-09-25 06:52:28,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:28,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:52:28,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533674204] [2020-09-25 06:52:28,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:52:28,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:52:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:28,062 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 8 states. [2020-09-25 06:52:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:28,305 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-09-25 06:52:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:52:28,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-09-25 06:52:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:28,307 INFO L225 Difference]: With dead ends: 163 [2020-09-25 06:52:28,307 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 06:52:28,309 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 06:52:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 06:52:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-25 06:52:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 06:52:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-25 06:52:28,325 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-25 06:52:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:28,327 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-25 06:52:28,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:52:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-25 06:52:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 06:52:28,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:28,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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 06:52:28,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:52:28,332 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -173943394, now seen corresponding path program 6 times [2020-09-25 06:52:28,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:28,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926937168] [2020-09-25 06:52:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:31,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:31,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 06:52:31,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:31,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3363 [2020-09-25 06:52:31,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:31,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:52:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 06:52:31,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 06:52:31,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:31,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:31,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:31,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:31,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:31,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:31,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:52:31,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:31,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:31,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:31,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:31,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:31,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 06:52:31,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926937168] [2020-09-25 06:52:31,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:31,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 06:52:31,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668235478] [2020-09-25 06:52:31,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 06:52:31,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 06:52:31,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:52:31,848 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 12 states. [2020-09-25 06:52:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:32,149 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-09-25 06:52:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 06:52:32,150 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2020-09-25 06:52:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:32,151 INFO L225 Difference]: With dead ends: 191 [2020-09-25 06:52:32,151 INFO L226 Difference]: Without dead ends: 121 [2020-09-25 06:52:32,153 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 06:52:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-25 06:52:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-09-25 06:52:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 06:52:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-25 06:52:32,164 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-25 06:52:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:32,165 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-25 06:52:32,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 06:52:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-25 06:52:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-25 06:52:32,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:32,167 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 06:52:32,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 06:52:32,168 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2012961241, now seen corresponding path program 7 times [2020-09-25 06:52:32,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:32,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648690745] [2020-09-25 06:52:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:32,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:32,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 06:52:32,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-09-25 06:52:32,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:32,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:52:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 06:52:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:52:32,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:32,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:32,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:32,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:32,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:32,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:52:32,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:32,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:32,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:32,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:32,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:32,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:32,644 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 06:52:32,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648690745] [2020-09-25 06:52:32,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:32,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 06:52:32,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729771153] [2020-09-25 06:52:32,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:52:32,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:32,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:52:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:52:32,655 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-25 06:52:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:32,912 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-09-25 06:52:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:52:32,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-25 06:52:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:32,914 INFO L225 Difference]: With dead ends: 177 [2020-09-25 06:52:32,914 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 06:52:32,915 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 06:52:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 06:52:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-25 06:52:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 06:52:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-25 06:52:32,921 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-25 06:52:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:32,922 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-25 06:52:32,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:52:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-25 06:52:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 06:52:32,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:32,924 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 06:52:32,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 06:52:32,925 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:32,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-25 06:52:32,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:32,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832994197] [2020-09-25 06:52:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:33,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:33,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 06:52:33,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:33,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-09-25 06:52:33,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:33,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:33,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:52:33,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 06:52:33,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 06:52:33,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:33,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:33,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:33,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:33,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:52:33,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:33,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:52:33,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:33,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:33,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:33,511 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 06:52:33,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832994197] [2020-09-25 06:52:33,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:52:33,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 06:52:33,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013652644] [2020-09-25 06:52:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 06:52:33,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 06:52:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:52:33,513 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-25 06:52:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:33,816 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-25 06:52:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 06:52:33,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 06:52:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:33,818 INFO L225 Difference]: With dead ends: 179 [2020-09-25 06:52:33,818 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 06:52:33,820 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 06:52:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 06:52:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-25 06:52:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 06:52:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-25 06:52:33,828 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-25 06:52:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:33,828 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-25 06:52:33,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 06:52:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-25 06:52:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 06:52:33,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:33,831 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 06:52:33,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 06:52:33,832 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-25 06:52:33,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:33,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475285919] [2020-09-25 06:52:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 06:52:33,862 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 06:52:33,863 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 06:52:33,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 06:52:33,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:52:33 BoogieIcfgContainer [2020-09-25 06:52:33,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:52:33,934 INFO L168 Benchmark]: Toolchain (without parser) took 17918.81 ms. Allocated memory was 140.5 MB in the beginning and 363.3 MB in the end (delta: 222.8 MB). Free memory was 102.1 MB in the beginning and 147.4 MB in the end (delta: -45.3 MB). Peak memory consumption was 177.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:33,936 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 06:52:33,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.11 ms. Allocated memory is still 140.5 MB. Free memory was 101.5 MB in the beginning and 90.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:33,941 INFO L168 Benchmark]: Boogie Preprocessor took 145.46 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 90.8 MB in the beginning and 181.8 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:33,944 INFO L168 Benchmark]: RCFGBuilder took 548.45 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 157.1 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:33,945 INFO L168 Benchmark]: TraceAbstraction took 16835.65 ms. Allocated memory was 204.5 MB in the beginning and 363.3 MB in the end (delta: 158.9 MB). Free memory was 156.5 MB in the beginning and 147.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 167.9 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:33,955 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.11 ms. Allocated memory is still 140.5 MB. Free memory was 101.5 MB in the beginning and 90.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.46 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 90.8 MB in the beginning and 181.8 MB in the end (delta: -91.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.45 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 157.1 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16835.65 ms. Allocated memory was 204.5 MB in the beginning and 363.3 MB in the end (delta: 158.9 MB). Free memory was 156.5 MB in the beginning and 147.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 167.9 MB. 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)<