/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:02:26,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:02:26,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:02:26,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:02:26,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:02:26,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:02:26,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:02:26,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:02:26,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:02:26,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:02:26,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:02:26,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:02:26,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:02:26,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:02:26,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:02:26,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:02:26,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:02:26,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:02:26,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:02:26,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:02:26,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:02:26,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:02:26,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:02:26,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:02:26,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:02:26,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:02:26,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:02:26,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:02:26,252 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 [2020-08-18 22:02:26,277 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:02:26,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:02:26,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:02:26,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:02:26,279 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:02:26,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:02:26,279 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:02:26,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:02:26,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:02:26,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:02:26,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:02:26,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:02:26,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:02:26,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:02:26,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:02:26,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:02:26,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:02:26,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:02:26,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:02:26,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:02:26,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:02:26,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:26,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:02:26,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:02:26,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:02:26,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:02:26,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:02:26,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:02:26,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:02:26,283 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:02:26,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:02:26,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:02:26,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:02:26,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:02:26,631 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:02:26,635 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 22:02:26,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/832e57dfe/29ccbf9d1c40435b86989ba5d65f2466/FLAGf7bfa1fc9 [2020-08-18 22:02:27,238 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:02:27,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 22:02:27,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/832e57dfe/29ccbf9d1c40435b86989ba5d65f2466/FLAGf7bfa1fc9 [2020-08-18 22:02:27,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/832e57dfe/29ccbf9d1c40435b86989ba5d65f2466 [2020-08-18 22:02:27,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:02:27,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:02:27,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:27,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:02:27,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:02:27,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:27" (1/1) ... [2020-08-18 22:02:27,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c40fe84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:27, skipping insertion in model container [2020-08-18 22:02:27,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:27" (1/1) ... [2020-08-18 22:02:27,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:02:27,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:02:27,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:27,869 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:02:27,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:28,012 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:02:28,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28 WrapperNode [2020-08-18 22:02:28,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:28,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:02:28,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:02:28,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:02:28,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (1/1) ... [2020-08-18 22:02:28,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:02:28,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:02:28,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:02:28,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:02:28,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (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 [2020-08-18 22:02:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:02:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:02:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:02:28,131 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-18 22:02:28,131 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-18 22:02:28,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:02:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:02:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-18 22:02:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-18 22:02:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-18 22:02:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-18 22:02:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-18 22:02:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-18 22:02:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-18 22:02:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-18 22:02:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-18 22:02:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-18 22:02:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:02:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:02:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:02:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:02:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:02:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:02:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:02:28,591 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:02:28,592 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 22:02:28,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:28 BoogieIcfgContainer [2020-08-18 22:02:28,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:02:28,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:02:28,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:02:28,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:02:28,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:02:27" (1/3) ... [2020-08-18 22:02:28,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574e8470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:28, skipping insertion in model container [2020-08-18 22:02:28,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:28" (2/3) ... [2020-08-18 22:02:28,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574e8470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:28, skipping insertion in model container [2020-08-18 22:02:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:28" (3/3) ... [2020-08-18 22:02:28,606 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 22:02:28,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:02:28,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:02:28,639 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:02:28,659 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:02:28,660 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:02:28,660 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:02:28,660 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:02:28,660 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:02:28,661 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:02:28,661 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:02:28,661 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:02:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-18 22:02:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 22:02:28,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:28,689 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] [2020-08-18 22:02:28,690 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:28,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-08-18 22:02:28,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:28,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710908528] [2020-08-18 22:02:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:28,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 22:02:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:28,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710908528] [2020-08-18 22:02:28,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:28,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:02:28,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862210919] [2020-08-18 22:02:28,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:02:28,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:02:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:02:28,956 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-08-18 22:02:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:29,166 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-08-18 22:02:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:02:29,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-18 22:02:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:29,177 INFO L225 Difference]: With dead ends: 104 [2020-08-18 22:02:29,177 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 22:02:29,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:02:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 22:02:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-18 22:02:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 22:02:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-08-18 22:02:29,227 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-08-18 22:02:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:29,228 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-08-18 22:02:29,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:02:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-08-18 22:02:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 22:02:29,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:29,230 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] [2020-08-18 22:02:29,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:02:29,231 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-08-18 22:02:29,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:29,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999654987] [2020-08-18 22:02:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 22:02:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:29,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999654987] [2020-08-18 22:02:29,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:29,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:02:29,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5863250] [2020-08-18 22:02:29,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:29,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:29,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:29,348 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-08-18 22:02:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:29,564 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-08-18 22:02:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:02:29,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-18 22:02:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:29,566 INFO L225 Difference]: With dead ends: 90 [2020-08-18 22:02:29,567 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 22:02:29,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 22:02:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-08-18 22:02:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 22:02:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-08-18 22:02:29,578 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2020-08-18 22:02:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:29,578 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-08-18 22:02:29,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-08-18 22:02:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 22:02:29,580 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:29,580 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 22:02:29,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:02:29,581 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1109616718, now seen corresponding path program 2 times [2020-08-18 22:02:29,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:29,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868431543] [2020-08-18 22:02:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 22:02:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:29,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868431543] [2020-08-18 22:02:29,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:29,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:02:29,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594476690] [2020-08-18 22:02:29,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:29,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:29,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:29,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:29,671 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-08-18 22:02:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:29,790 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-08-18 22:02:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:29,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-18 22:02:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:29,792 INFO L225 Difference]: With dead ends: 92 [2020-08-18 22:02:29,792 INFO L226 Difference]: Without dead ends: 53 [2020-08-18 22:02:29,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-18 22:02:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-08-18 22:02:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 22:02:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-08-18 22:02:29,801 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 40 [2020-08-18 22:02:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:29,802 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-08-18 22:02:29,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-08-18 22:02:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 22:02:29,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:29,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:29,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:02:29,804 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:29,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2091262388, now seen corresponding path program 3 times [2020-08-18 22:02:29,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:29,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093081655] [2020-08-18 22:02:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:02:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:29,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093081655] [2020-08-18 22:02:29,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:29,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:02:29,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43853177] [2020-08-18 22:02:29,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:02:29,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:02:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:29,911 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-08-18 22:02:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:30,040 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-08-18 22:02:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:02:30,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-18 22:02:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:30,042 INFO L225 Difference]: With dead ends: 94 [2020-08-18 22:02:30,042 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 22:02:30,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:30,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 22:02:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-08-18 22:02:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 22:02:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-08-18 22:02:30,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2020-08-18 22:02:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:30,061 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-08-18 22:02:30,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:02:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-08-18 22:02:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 22:02:30,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:30,066 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:30,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:02:30,066 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1355467978, now seen corresponding path program 4 times [2020-08-18 22:02:30,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:30,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781158568] [2020-08-18 22:02:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 22:02:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:30,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781158568] [2020-08-18 22:02:30,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:30,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:02:30,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856958280] [2020-08-18 22:02:30,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:02:30,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:30,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:02:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:30,187 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 8 states. [2020-08-18 22:02:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:30,308 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-08-18 22:02:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:02:30,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-08-18 22:02:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:30,310 INFO L225 Difference]: With dead ends: 96 [2020-08-18 22:02:30,310 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 22:02:30,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 22:02:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-08-18 22:02:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 22:02:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-08-18 22:02:30,319 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 44 [2020-08-18 22:02:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:30,320 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-08-18 22:02:30,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:02:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-08-18 22:02:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 22:02:30,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:30,322 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:30,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:02:30,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:30,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2051402808, now seen corresponding path program 5 times [2020-08-18 22:02:30,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:30,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220889061] [2020-08-18 22:02:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:30,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220889061] [2020-08-18 22:02:30,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:30,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:02:30,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470109255] [2020-08-18 22:02:30,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:02:30,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:02:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:30,467 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 9 states. [2020-08-18 22:02:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:30,646 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-18 22:02:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:02:30,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-08-18 22:02:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:30,648 INFO L225 Difference]: With dead ends: 98 [2020-08-18 22:02:30,648 INFO L226 Difference]: Without dead ends: 59 [2020-08-18 22:02:30,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-18 22:02:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-18 22:02:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 22:02:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-08-18 22:02:30,656 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 46 [2020-08-18 22:02:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:30,657 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-08-18 22:02:30,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:02:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-08-18 22:02:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 22:02:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:30,659 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:30,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:02:30,659 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1005818694, now seen corresponding path program 6 times [2020-08-18 22:02:30,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:30,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108213517] [2020-08-18 22:02:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:02:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:30,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108213517] [2020-08-18 22:02:30,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:30,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:02:30,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209438833] [2020-08-18 22:02:30,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:02:30,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:02:30,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:30,770 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-08-18 22:02:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:30,913 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-08-18 22:02:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:02:30,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-08-18 22:02:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:30,915 INFO L225 Difference]: With dead ends: 100 [2020-08-18 22:02:30,915 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 22:02:30,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:30,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 22:02:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-08-18 22:02:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 22:02:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-08-18 22:02:30,930 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2020-08-18 22:02:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:30,934 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-08-18 22:02:30,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:02:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-08-18 22:02:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 22:02:30,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:30,935 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:30,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:02:30,935 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1238051652, now seen corresponding path program 7 times [2020-08-18 22:02:30,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:30,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589593619] [2020-08-18 22:02:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:02:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:31,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589593619] [2020-08-18 22:02:31,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:31,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:02:31,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291206550] [2020-08-18 22:02:31,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:02:31,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:02:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:31,076 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 11 states. [2020-08-18 22:02:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:31,221 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-08-18 22:02:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:02:31,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-08-18 22:02:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:31,223 INFO L225 Difference]: With dead ends: 101 [2020-08-18 22:02:31,223 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 22:02:31,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 22:02:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-08-18 22:02:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 22:02:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-08-18 22:02:31,230 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 50 [2020-08-18 22:02:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:31,230 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-08-18 22:02:31,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:02:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-08-18 22:02:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 22:02:31,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:31,232 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:31,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:02:31,232 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1075624898, now seen corresponding path program 8 times [2020-08-18 22:02:31,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:31,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275656559] [2020-08-18 22:02:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:02:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-18 22:02:31,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275656559] [2020-08-18 22:02:31,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:31,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:02:31,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358397444] [2020-08-18 22:02:31,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:02:31,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:31,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:02:31,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:02:31,300 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-08-18 22:02:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:31,389 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-18 22:02:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:02:31,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-08-18 22:02:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:31,390 INFO L225 Difference]: With dead ends: 98 [2020-08-18 22:02:31,402 INFO L226 Difference]: Without dead ends: 63 [2020-08-18 22:02:31,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:02:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-18 22:02:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-18 22:02:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 22:02:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-08-18 22:02:31,408 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 52 [2020-08-18 22:02:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:31,409 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-08-18 22:02:31,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:02:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-08-18 22:02:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 22:02:31,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:31,410 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:31,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:02:31,411 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash -856770180, now seen corresponding path program 1 times [2020-08-18 22:02:31,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:31,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975119651] [2020-08-18 22:02:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:02:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-18 22:02:31,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975119651] [2020-08-18 22:02:31,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:31,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:02:31,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917342373] [2020-08-18 22:02:31,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:02:31,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:31,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:02:31,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:31,504 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 7 states. [2020-08-18 22:02:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:31,761 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-08-18 22:02:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:02:31,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-18 22:02:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:31,764 INFO L225 Difference]: With dead ends: 147 [2020-08-18 22:02:31,764 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 22:02:31,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 22:02:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-08-18 22:02:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 22:02:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-18 22:02:31,776 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 52 [2020-08-18 22:02:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:31,777 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-18 22:02:31,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:02:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-18 22:02:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 22:02:31,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:31,778 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:31,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:02:31,778 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1749253374, now seen corresponding path program 1 times [2020-08-18 22:02:31,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:31,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251075227] [2020-08-18 22:02:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:02:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-18 22:02:31,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251075227] [2020-08-18 22:02:31,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:31,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:02:31,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17847049] [2020-08-18 22:02:31,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:31,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:31,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:31,850 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 6 states. [2020-08-18 22:02:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:32,007 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-08-18 22:02:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:32,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-18 22:02:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:32,009 INFO L225 Difference]: With dead ends: 132 [2020-08-18 22:02:32,009 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 22:02:32,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 22:02:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-08-18 22:02:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 22:02:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-08-18 22:02:32,017 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 52 [2020-08-18 22:02:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:32,018 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-08-18 22:02:32,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-08-18 22:02:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 22:02:32,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:32,019 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-08-18 22:02:32,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:02:32,020 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 694889275, now seen corresponding path program 1 times [2020-08-18 22:02:32,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:32,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689992812] [2020-08-18 22:02:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 22:02:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-18 22:02:32,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689992812] [2020-08-18 22:02:32,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:32,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:02:32,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451036784] [2020-08-18 22:02:32,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:02:32,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:02:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:32,094 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 7 states. [2020-08-18 22:02:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:32,403 INFO L93 Difference]: Finished difference Result 159 states and 204 transitions. [2020-08-18 22:02:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:02:32,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-08-18 22:02:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:32,405 INFO L225 Difference]: With dead ends: 159 [2020-08-18 22:02:32,405 INFO L226 Difference]: Without dead ends: 114 [2020-08-18 22:02:32,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-18 22:02:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-08-18 22:02:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 22:02:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-08-18 22:02:32,421 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 57 [2020-08-18 22:02:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:32,421 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-08-18 22:02:32,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:02:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-08-18 22:02:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 22:02:32,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:32,423 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-08-18 22:02:32,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:02:32,423 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -994054467, now seen corresponding path program 1 times [2020-08-18 22:02:32,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:32,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013239914] [2020-08-18 22:02:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 22:02:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-18 22:02:32,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013239914] [2020-08-18 22:02:32,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:32,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:02:32,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661196223] [2020-08-18 22:02:32,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:32,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:32,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:32,515 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 6 states. [2020-08-18 22:02:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:32,679 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2020-08-18 22:02:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:02:32,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 22:02:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:32,681 INFO L225 Difference]: With dead ends: 151 [2020-08-18 22:02:32,681 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 22:02:32,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 22:02:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2020-08-18 22:02:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 22:02:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-08-18 22:02:32,699 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2020-08-18 22:02:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:32,701 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-08-18 22:02:32,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-08-18 22:02:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 22:02:32,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:32,703 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-08-18 22:02:32,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:02:32,703 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 1 times [2020-08-18 22:02:32,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:32,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396835084] [2020-08-18 22:02:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 22:02:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-18 22:02:32,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396835084] [2020-08-18 22:02:32,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:32,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:02:32,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776100077] [2020-08-18 22:02:32,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:32,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:32,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:32,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:32,808 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 6 states. [2020-08-18 22:02:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:32,929 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-08-18 22:02:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:32,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 22:02:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:32,930 INFO L225 Difference]: With dead ends: 96 [2020-08-18 22:02:32,930 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:02:32,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:02:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:02:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:02:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:02:32,932 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-08-18 22:02:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:32,932 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:02:32,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:02:32,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:02:32,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:02:32,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:02:33,030 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-08-18 22:02:33,030 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-08-18 22:02:33,030 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-08-18 22:02:33,030 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-08-18 22:02:33,030 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-08-18 22:02:33,031 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-08-18 22:02:33,031 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-08-18 22:02:33,031 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-08-18 22:02:33,031 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-08-18 22:02:33,031 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-08-18 22:02:33,031 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-08-18 22:02:33,032 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-18 22:02:33,032 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-08-18 22:02:33,032 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-08-18 22:02:33,032 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-08-18 22:02:33,032 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-08-18 22:02:33,032 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-18 22:02:33,032 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-08-18 22:02:33,033 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-08-18 22:02:33,033 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-08-18 22:02:33,033 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-18 22:02:33,033 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-08-18 22:02:33,033 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-08-18 22:02:33,033 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-08-18 22:02:33,034 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:02:33,035 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 22:02:33,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:02:33,035 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-08-18 22:02:33,035 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-08-18 22:02:33,035 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-08-18 22:02:33,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:02:33,035 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:02:33,036 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:02:33,036 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:02:33,036 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-18 22:02:33,036 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-08-18 22:02:33,036 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-08-18 22:02:33,036 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-08-18 22:02:33,036 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-08-18 22:02:33,037 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-08-18 22:02:33,037 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-08-18 22:02:33,037 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-08-18 22:02:33,037 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 22:02:33,037 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 22:02:33,037 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 22:02:33,037 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 22:02:33,038 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 22:02:33,038 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 22:02:33,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:02:33 BoogieIcfgContainer [2020-08-18 22:02:33,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:02:33,052 INFO L168 Benchmark]: Toolchain (without parser) took 5434.84 ms. Allocated memory was 141.0 MB in the beginning and 281.0 MB in the end (delta: 140.0 MB). Free memory was 103.9 MB in the beginning and 117.5 MB in the end (delta: -13.7 MB). Peak memory consumption was 126.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:33,052 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:02:33,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.02 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 103.6 MB in the beginning and 179.0 MB in the end (delta: -75.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:33,054 INFO L168 Benchmark]: Boogie Preprocessor took 61.73 ms. Allocated memory is still 202.9 MB. Free memory was 179.0 MB in the beginning and 177.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:33,054 INFO L168 Benchmark]: RCFGBuilder took 521.98 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 147.7 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:33,055 INFO L168 Benchmark]: TraceAbstraction took 4450.84 ms. Allocated memory was 202.9 MB in the beginning and 281.0 MB in the end (delta: 78.1 MB). Free memory was 147.7 MB in the beginning and 117.5 MB in the end (delta: 30.2 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:33,058 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 396.02 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 103.6 MB in the beginning and 179.0 MB in the end (delta: -75.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.73 ms. Allocated memory is still 202.9 MB. Free memory was 179.0 MB in the beginning and 177.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 521.98 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 147.7 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4450.84 ms. Allocated memory was 202.9 MB in the beginning and 281.0 MB in the end (delta: 78.1 MB). Free memory was 147.7 MB in the beginning and 117.5 MB in the end (delta: 30.2 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 14, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 732 SDtfs, 388 SDslu, 1954 SDs, 0 SdLazy, 1655 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 88 PreInvPairs, 113 NumberOfFragments, 35 HoareAnnotationTreeSize, 88 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 667 NumberOfCodeBlocks, 667 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 653 ConstructedInterpolants, 0 QuantifiedInterpolants, 57554 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 390/530 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...