/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:10,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:10,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:10,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:10,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:10,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:10,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:10,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:10,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:10,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:10,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:10,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:10,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:10,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:10,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:10,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:10,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:10,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:10,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:10,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:10,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:10,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:10,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:10,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:10,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:10,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:10,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:10,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:10,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:10,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:10,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:10,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:10,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:10,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:10,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:10,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:10,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:10,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:10,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:10,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:10,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:10,245 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 [2020-09-24 16:10:10,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:10,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:10,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:10,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:10,276 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:10,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:10,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:10,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:10,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:10,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:10,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:10,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:10,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:10,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:10,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:10,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:10,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:10,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:10,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:10,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:10,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:10,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:10,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:10,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:10,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:10,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:10,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:10,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:10,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:10,282 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:10:10,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:10,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:10,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:10,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:10,822 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:10,823 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-24 16:10:10,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9cf6a9a2/34bf8a66d44b4c92a2479572b12eccc5/FLAG0be8a56a7 [2020-09-24 16:10:11,522 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:11,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-24 16:10:11,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9cf6a9a2/34bf8a66d44b4c92a2479572b12eccc5/FLAG0be8a56a7 [2020-09-24 16:10:11,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9cf6a9a2/34bf8a66d44b4c92a2479572b12eccc5 [2020-09-24 16:10:11,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:11,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:11,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:11,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:11,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:11,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:11" (1/1) ... [2020-09-24 16:10:11,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1571b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:11, skipping insertion in model container [2020-09-24 16:10:11,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:11" (1/1) ... [2020-09-24 16:10:11,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:11,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:12,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:12,163 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:12,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:12,211 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:12,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12 WrapperNode [2020-09-24 16:10:12,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:12,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:12,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:12,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:12,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... [2020-09-24 16:10:12,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:12,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:12,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:12,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:12,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:12,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:12,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:10:12,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:12,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 16:10:12,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 16:10:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:10:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 16:10:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 16:10:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:10:12,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:12,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:12,741 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:12,742 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 16:10:12,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:12 BoogieIcfgContainer [2020-09-24 16:10:12,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:12,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:12,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:12,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:12,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:11" (1/3) ... [2020-09-24 16:10:12,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b31c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:12, skipping insertion in model container [2020-09-24 16:10:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:12" (2/3) ... [2020-09-24 16:10:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b31c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:12, skipping insertion in model container [2020-09-24 16:10:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:12" (3/3) ... [2020-09-24 16:10:12,759 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-24 16:10:12,774 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:12,787 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:12,814 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:12,849 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:12,849 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:12,849 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:12,849 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:12,849 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:12,850 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:12,850 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:12,850 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-24 16:10:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 16:10:12,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:12,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:12,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-24 16:10:12,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:12,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028621111] [2020-09-24 16:10:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:13,075 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:13,075 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:13,075 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:13,075 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:13,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:10:13,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:13,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 16:10:13,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:13,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:13,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 16:10:13,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:13,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:13,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:13,169 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:13,169 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:13,170 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:13,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:13,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:13,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:13,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:13,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:13,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:13,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:13,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:13,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:13,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028621111] [2020-09-24 16:10:13,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:13,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:13,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973601539] [2020-09-24 16:10:13,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:13,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:13,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:13,224 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-24 16:10:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:13,407 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-24 16:10:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:13,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 16:10:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:13,422 INFO L225 Difference]: With dead ends: 121 [2020-09-24 16:10:13,422 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 16:10:13,427 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 [2020-09-24 16:10:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 16:10:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-24 16:10:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 16:10:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-24 16:10:13,485 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-24 16:10:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:13,485 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-24 16:10:13,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-24 16:10:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 16:10:13,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:13,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:13,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:13,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-24 16:10:13,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:13,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158842617] [2020-09-24 16:10:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:13,548 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:13,549 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:13,549 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:13,549 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:13,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:10:13,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:13,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 16:10:13,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:13,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:10:13,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:13,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:10:13,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:13,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:13,664 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:13,664 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:13,665 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:13,665 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:13,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:13,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:13,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:13,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:13,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158842617] [2020-09-24 16:10:13,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:13,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:10:13,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738956516] [2020-09-24 16:10:13,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:13,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:13,680 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-24 16:10:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:13,873 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-09-24 16:10:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:13,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 16:10:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:13,876 INFO L225 Difference]: With dead ends: 101 [2020-09-24 16:10:13,876 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 16:10:13,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 16:10:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2020-09-24 16:10:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 16:10:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 16:10:13,889 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-24 16:10:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:13,890 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 16:10:13,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 16:10:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 16:10:13,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:13,892 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] [2020-09-24 16:10:13,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:13,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:13,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1837873718, now seen corresponding path program 1 times [2020-09-24 16:10:13,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:13,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746315755] [2020-09-24 16:10:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:13,948 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:13,948 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:13,948 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:13,948 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:13,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 16:10:13,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:13,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 16:10:13,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:13,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:10:13,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:13,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:10:13,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:14,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:14,051 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:14,052 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:14,052 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:14,052 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:14,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:14,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:14,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:14,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:14,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 16:10:14,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746315755] [2020-09-24 16:10:14,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:14,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:10:14,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857498062] [2020-09-24 16:10:14,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:14,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:14,069 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2020-09-24 16:10:14,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:14,245 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-24 16:10:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:14,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-24 16:10:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:14,249 INFO L225 Difference]: With dead ends: 95 [2020-09-24 16:10:14,249 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 16:10:14,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 16:10:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-09-24 16:10:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 16:10:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-24 16:10:14,265 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 38 [2020-09-24 16:10:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:14,265 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-24 16:10:14,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-24 16:10:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 16:10:14,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:14,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:14,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:14,268 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-24 16:10:14,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:14,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115771378] [2020-09-24 16:10:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:14,594 FATAL L256 erpolLogProxyWrapper]: Difference in size: 4 [2020-09-24 16:10:14,594 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -2 [2020-09-24 16:10:14,595 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-24 16:10:14,595 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:14,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 16:10:14,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:14,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-09-24 16:10:14,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 16:10:14,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:14,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 16:10:14,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:14,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:14,977 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:14,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:14,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:14,978 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:14,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:14,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:14,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:14,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:14,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:14,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:14,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115771378] [2020-09-24 16:10:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:14,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:10:14,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709354046] [2020-09-24 16:10:14,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:10:14,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:10:15,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:10:15,000 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-24 16:10:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:16,034 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2020-09-24 16:10:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 16:10:16,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-24 16:10:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:16,038 INFO L225 Difference]: With dead ends: 158 [2020-09-24 16:10:16,039 INFO L226 Difference]: Without dead ends: 156 [2020-09-24 16:10:16,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:10:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-24 16:10:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 90. [2020-09-24 16:10:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 16:10:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-24 16:10:16,067 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-24 16:10:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:16,068 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-24 16:10:16,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:10:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-24 16:10:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 16:10:16,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:16,072 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] [2020-09-24 16:10:16,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:16,076 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-24 16:10:16,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:16,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250699863] [2020-09-24 16:10:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:16,137 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:16,138 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:16,138 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:16,138 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:16,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:10:16,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:16,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:10:16,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 16:10:16,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 16:10:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:16,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:16,229 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:16,229 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:16,229 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:16,229 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:16,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:16,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:16,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:16,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:16,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250699863] [2020-09-24 16:10:16,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:16,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:10:16,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651454860] [2020-09-24 16:10:16,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:16,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:16,248 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 8 states. [2020-09-24 16:10:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:16,617 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-24 16:10:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 16:10:16,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-24 16:10:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:16,622 INFO L225 Difference]: With dead ends: 166 [2020-09-24 16:10:16,622 INFO L226 Difference]: Without dead ends: 146 [2020-09-24 16:10:16,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-24 16:10:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-24 16:10:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 16:10:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-24 16:10:16,635 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 55 [2020-09-24 16:10:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:16,636 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-24 16:10:16,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-24 16:10:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 16:10:16,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:16,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:16,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:16,638 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:16,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-24 16:10:16,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:16,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674606877] [2020-09-24 16:10:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:16,671 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 16:10:16,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 16:10:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 16:10:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:16,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:16,774 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:16,775 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:16,775 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:16,775 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:16,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:16,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:16,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:10:16,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:16,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:16,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:16,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674606877] [2020-09-24 16:10:16,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:16,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:10:16,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358729639] [2020-09-24 16:10:16,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:10:16,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:10:16,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:10:16,796 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 9 states. [2020-09-24 16:10:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:17,068 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2020-09-24 16:10:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:17,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-09-24 16:10:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:17,070 INFO L225 Difference]: With dead ends: 158 [2020-09-24 16:10:17,070 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 16:10:17,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 16:10:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2020-09-24 16:10:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 16:10:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-24 16:10:17,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 58 [2020-09-24 16:10:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:17,095 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-24 16:10:17,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:10:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-24 16:10:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 16:10:17,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:17,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:17,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:17,101 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-24 16:10:17,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:17,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589554055] [2020-09-24 16:10:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:17,142 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:17,142 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:17,142 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:17,142 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:17,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 16:10:17,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:17,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:10:17,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:17,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 16:10:17,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 16:10:17,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:17,254 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:17,254 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:17,254 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:17,254 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:17,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:17,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:17,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:17,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:17,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:17,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:17,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:17,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 16:10:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:17,262 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:17,262 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:17,262 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:17,262 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:17,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 16:10:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:17,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 16:10:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 16:10:17,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589554055] [2020-09-24 16:10:17,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:17,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:10:17,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803558452] [2020-09-24 16:10:17,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:17,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:17,285 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 10 states. [2020-09-24 16:10:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:17,544 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-24 16:10:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:17,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-24 16:10:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:17,547 INFO L225 Difference]: With dead ends: 143 [2020-09-24 16:10:17,547 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 16:10:17,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 16:10:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-09-24 16:10:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 16:10:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 16:10:17,555 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 64 [2020-09-24 16:10:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:17,555 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 16:10:17,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 16:10:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 16:10:17,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:17,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:17,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:17,557 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-24 16:10:17,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:17,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797468922] [2020-09-24 16:10:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:17,681 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-24 16:10:17,682 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -6 [2020-09-24 16:10:17,682 FATAL L256 erpolLogProxyWrapper]: Difference in width: 6 [2020-09-24 16:10:17,682 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:17,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 16:10:17,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:17,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-09-24 16:10:17,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 16:10:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 16:10:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:10:17,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:18,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:18,207 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:18,207 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:18,207 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:18,207 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:18,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:18,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:18,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:18,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:18,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:18,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:18,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:18,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:18,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797468922] [2020-09-24 16:10:18,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:18,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:10:18,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089209142] [2020-09-24 16:10:18,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:10:18,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:18,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:10:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:10:18,224 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-09-24 16:10:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:19,982 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2020-09-24 16:10:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 16:10:19,989 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-09-24 16:10:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:19,991 INFO L225 Difference]: With dead ends: 191 [2020-09-24 16:10:19,991 INFO L226 Difference]: Without dead ends: 189 [2020-09-24 16:10:19,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 16:10:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-24 16:10:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2020-09-24 16:10:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-24 16:10:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-24 16:10:20,003 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 65 [2020-09-24 16:10:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:20,003 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-24 16:10:20,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:10:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-24 16:10:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 16:10:20,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:20,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:20,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:20,005 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 5 times [2020-09-24 16:10:20,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:20,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977566421] [2020-09-24 16:10:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,047 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,047 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 16:10:20,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:10:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 16:10:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 16:10:20,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:20,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,169 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,169 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,170 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:20,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:20,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:20,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:20,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:20,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977566421] [2020-09-24 16:10:20,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:20,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 16:10:20,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364775056] [2020-09-24 16:10:20,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:10:20,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:10:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:20,188 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 12 states. [2020-09-24 16:10:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:20,683 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-09-24 16:10:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:10:20,684 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-09-24 16:10:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:20,687 INFO L225 Difference]: With dead ends: 193 [2020-09-24 16:10:20,687 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 16:10:20,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:10:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 16:10:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2020-09-24 16:10:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 16:10:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-24 16:10:20,705 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 72 [2020-09-24 16:10:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:20,706 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-24 16:10:20,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:10:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-24 16:10:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 16:10:20,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:20,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:20,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:10:20,710 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 6 times [2020-09-24 16:10:20,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:20,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979948392] [2020-09-24 16:10:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,772 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,772 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,772 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,772 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 16:10:20,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 16:10:20,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 16:10:20,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 16:10:20,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:20,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,929 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,930 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,930 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,930 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:20,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:20,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:20,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:20,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979948392] [2020-09-24 16:10:20,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:20,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:10:20,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727748779] [2020-09-24 16:10:20,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:10:20,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:20,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:10:20,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:10:20,944 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 13 states. [2020-09-24 16:10:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:21,412 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2020-09-24 16:10:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:10:21,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-09-24 16:10:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:21,414 INFO L225 Difference]: With dead ends: 192 [2020-09-24 16:10:21,414 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 16:10:21,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-09-24 16:10:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 16:10:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 127. [2020-09-24 16:10:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 16:10:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-09-24 16:10:21,426 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2020-09-24 16:10:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:21,426 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-09-24 16:10:21,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:10:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-09-24 16:10:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 16:10:21,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:21,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:21,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:10:21,429 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 2 times [2020-09-24 16:10:21,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:21,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443522455] [2020-09-24 16:10:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 16:10:21,463 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 16:10:21,463 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 16:10:21,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:10:21,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:21 BoogieIcfgContainer [2020-09-24 16:10:21,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:10:21,505 INFO L168 Benchmark]: Toolchain (without parser) took 9633.27 ms. Allocated memory was 146.3 MB in the beginning and 302.0 MB in the end (delta: 155.7 MB). Free memory was 102.9 MB in the beginning and 223.5 MB in the end (delta: -120.6 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:21,505 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.3 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. [2020-09-24 16:10:21,506 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.66 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 91.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:21,510 INFO L168 Benchmark]: Boogie Preprocessor took 135.24 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 179.0 MB in the end (delta: -87.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:21,513 INFO L168 Benchmark]: RCFGBuilder took 399.20 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 160.3 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:21,514 INFO L168 Benchmark]: TraceAbstraction took 8751.32 ms. Allocated memory was 201.9 MB in the beginning and 302.0 MB in the end (delta: 100.1 MB). Free memory was 160.3 MB in the beginning and 223.5 MB in the end (delta: -63.2 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:21,522 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 146.3 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 337.66 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 91.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.24 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 179.0 MB in the end (delta: -87.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.20 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 160.3 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8751.32 ms. Allocated memory was 201.9 MB in the beginning and 302.0 MB in the end (delta: 100.1 MB). Free memory was 160.3 MB in the beginning and 223.5 MB in the end (delta: -63.2 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i