/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-patterns/array7_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:51:35,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:51:35,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:51:35,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:51:35,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:51:35,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:51:35,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:51:35,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:51:35,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:51:35,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:51:35,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:51:35,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:51:35,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:51:35,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:51:35,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:51:35,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:51:35,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:51:35,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:51:35,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:51:35,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:51:35,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:51:35,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:51:35,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:51:35,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:51:35,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:51:35,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:51:35,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:51:35,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:51:35,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:51:35,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:51:35,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:51:35,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:51:35,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:51:35,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:51:35,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:51:35,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:51:35,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:51:35,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:51:35,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:51:35,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:51:35,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:51:35,189 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 [2020-10-27 14:51:35,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:51:35,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:51:35,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:51:35,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:51:35,253 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:51:35,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:51:35,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:51:35,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:51:35,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:51:35,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:51:35,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:51:35,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:51:35,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:51:35,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:51:35,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:51:35,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:51:35,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:51:35,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:51:35,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:51:35,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:51:35,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:51:35,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:51:35,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:51:35,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:51:35,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:51:35,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:51:35,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:51:35,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:51:35,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:51:35,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:51:35,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:51:35,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:51:35,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:51:35,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:51:35,670 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:51:35,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array7_pattern.c [2020-10-27 14:51:35,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/250428ad0/8d9eb0e12731416d972a9ccf53a10651/FLAGdd9516c1a [2020-10-27 14:51:36,516 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:51:36,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-patterns/array7_pattern.c [2020-10-27 14:51:36,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/250428ad0/8d9eb0e12731416d972a9ccf53a10651/FLAGdd9516c1a [2020-10-27 14:51:36,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/250428ad0/8d9eb0e12731416d972a9ccf53a10651 [2020-10-27 14:51:36,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:51:36,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:51:36,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:51:36,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:51:36,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:51:36,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:51:36" (1/1) ... [2020-10-27 14:51:36,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfeec84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:36, skipping insertion in model container [2020-10-27 14:51:36,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:51:36" (1/1) ... [2020-10-27 14:51:36,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:51:36,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:51:37,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:51:37,102 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:51:37,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:51:37,151 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:51:37,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37 WrapperNode [2020-10-27 14:51:37,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:51:37,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:51:37,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:51:37,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:51:37,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (1/1) ... [2020-10-27 14:51:37,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:51:37,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:51:37,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:51:37,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:51:37,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (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 [2020-10-27 14:51:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:51:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:51:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:51:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:51:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:51:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:51:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:51:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:51:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:51:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:51:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:51:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:51:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:51:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-27 14:51:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:51:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:51:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:51:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:51:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:51:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:51:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:51:37,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:51:37,741 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:51:37,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:51:37 BoogieIcfgContainer [2020-10-27 14:51:37,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:51:37,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:51:37,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:51:37,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:51:37,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:51:36" (1/3) ... [2020-10-27 14:51:37,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e49edba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:51:37, skipping insertion in model container [2020-10-27 14:51:37,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:37" (2/3) ... [2020-10-27 14:51:37,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e49edba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:51:37, skipping insertion in model container [2020-10-27 14:51:37,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:51:37" (3/3) ... [2020-10-27 14:51:37,754 INFO L111 eAbstractionObserver]: Analyzing ICFG array7_pattern.c [2020-10-27 14:51:37,766 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:51:37,772 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:51:37,786 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:51:37,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:51:37,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:51:37,816 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:51:37,816 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:51:37,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:51:37,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:51:37,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:51:37,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:51:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-27 14:51:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:51:37,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:37,852 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] [2020-10-27 14:51:37,852 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:37,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:37,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1744013630, now seen corresponding path program 1 times [2020-10-27 14:51:37,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:37,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337537139] [2020-10-27 14:51:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:38,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:38,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:51:38,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:38,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-27 14:51:38,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:51:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:51:38,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:38,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:38,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:38,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:38,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:38,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:51:38,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:38,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:38,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:38,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:38,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:38,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 14:51:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:38,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:38,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:38,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:38,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:51:38,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:38,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:51:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:38,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:51:38,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337537139] [2020-10-27 14:51:38,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:51:38,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:51:38,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019114549] [2020-10-27 14:51:38,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:51:38,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:51:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:51:38,918 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-27 14:51:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:39,102 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-27 14:51:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:51:39,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-27 14:51:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:39,114 INFO L225 Difference]: With dead ends: 66 [2020-10-27 14:51:39,114 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:51:39,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:51:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:51:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:51:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:51:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 14:51:39,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-27 14:51:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:39,169 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 14:51:39,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:51:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 14:51:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:51:39,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:39,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:39,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:51:39,173 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1506726331, now seen corresponding path program 1 times [2020-10-27 14:51:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:39,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579541355] [2020-10-27 14:51:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:39,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:39,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:39,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:40,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:51:44,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:51:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:51:44,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:51:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:51:44,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:51:44,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 14:51:44,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:44,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:44,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:51:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:44,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 14:51:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:44,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:44,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:51:44,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:44,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:44,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:44,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 14:51:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:44,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:44,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:51:44,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:51:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:51:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:44,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:51:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:44,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:44,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:51:44,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:51:44,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:44,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:51:44,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:51:44,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579541355] [2020-10-27 14:51:44,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:51:44,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:51:44,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193360966] [2020-10-27 14:51:44,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:51:44,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:51:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:51:44,533 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-10-27 14:51:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:47,380 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-27 14:51:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:51:47,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:51:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:47,385 INFO L225 Difference]: With dead ends: 43 [2020-10-27 14:51:47,385 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:51:47,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:51:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:51:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 14:51:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:51:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-27 14:51:47,403 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2020-10-27 14:51:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:47,404 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-27 14:51:47,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:51:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-27 14:51:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:51:47,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:47,408 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:47,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:51:47,409 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash -662875523, now seen corresponding path program 1 times [2020-10-27 14:51:47,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:47,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878117041] [2020-10-27 14:51:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:47,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:52,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:51:52,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:51:52,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:51:52,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:52,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:51:52,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:51:52,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:51:52,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:52,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:52,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:52,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:52,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:51:52,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:52,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:52,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 14:51:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:52,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:52,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:52,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:51:52,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:52,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:52,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 14:51:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:52,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:52,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:52,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:52,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:51:52,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:51:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:51:52,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:52,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:51:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:52,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:52,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:51:52,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:52,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 14:51:52,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:52,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:51:52,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:52,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:51:52,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:51:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:51:52,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878117041] [2020-10-27 14:51:52,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:52,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:51:52,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201810640] [2020-10-27 14:51:52,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:51:52,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:51:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:51:52,782 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-10-27 14:51:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:55,650 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-27 14:51:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:51:55,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-27 14:51:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:55,653 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:51:55,653 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 14:51:55,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:51:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 14:51:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 14:51:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:51:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 14:51:55,664 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 35 [2020-10-27 14:51:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:55,665 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 14:51:55,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:51:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 14:51:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:51:55,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:55,667 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 14:51:55,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:51:55,667 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1703848639, now seen corresponding path program 2 times [2020-10-27 14:51:55,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:55,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870626693] [2020-10-27 14:51:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:55,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:55,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:56,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:00,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:00,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:52:00,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:52:00,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:52:00,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:52:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:52:00,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:52:00,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:00,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:00,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:00,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:00,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:00,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:00,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:52:00,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:00,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:00,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:00,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:00,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:00,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 14:52:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:00,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:00,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:00,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:00,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:00,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:00,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:00,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:52:00,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 14:52:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:00,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:00,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:00,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:52:00,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:52:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:52:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:52:00,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:52:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:00,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:00,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:00,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:00,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:00,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:52:00,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:00,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:52:00,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:00,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:52:00,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:52:00,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870626693] [2020-10-27 14:52:00,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:00,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:52:00,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184103993] [2020-10-27 14:52:00,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:52:00,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:52:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:52:00,941 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-10-27 14:52:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:04,793 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-27 14:52:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:52:04,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 14:52:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:04,797 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:52:04,798 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:52:04,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:52:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:52:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 14:52:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:52:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-27 14:52:04,816 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 37 [2020-10-27 14:52:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:04,818 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-27 14:52:04,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:52:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-27 14:52:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:52:04,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:04,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:04,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:52:04,822 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash -206898559, now seen corresponding path program 3 times [2020-10-27 14:52:04,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:04,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720129356] [2020-10-27 14:52:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:52:09,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:52:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:52:09,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:52:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:52:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:52:09,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:09,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:52:09,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 14:52:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:09,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:52:09,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:52:09,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 14:52:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:09,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 14:52:09,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:52:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:52:09,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:10,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:52:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:10,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:10,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:10,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:10,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:52:10,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:52:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:52:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:52:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:52:10,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720129356] [2020-10-27 14:52:10,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:52:10,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:52:10,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657809391] [2020-10-27 14:52:10,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:52:10,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:52:10,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:52:10,129 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-27 14:52:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:10,706 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-27 14:52:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:52:10,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-27 14:52:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:10,708 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:52:10,708 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:52:10,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:52:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:52:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 14:52:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:52:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-27 14:52:10,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 39 [2020-10-27 14:52:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:10,719 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-27 14:52:10,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:52:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-27 14:52:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:52:10,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:10,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:10,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:52:10,721 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash -262153185, now seen corresponding path program 1 times [2020-10-27 14:52:10,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:10,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427556545] [2020-10-27 14:52:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:10,735 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-27 14:52:10,736 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-27 14:52:10,736 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 14:52:10,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:52:10,764 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-27 14:52:10,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:52:10 BoogieIcfgContainer [2020-10-27 14:52:10,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 14:52:10,767 INFO L168 Benchmark]: Toolchain (without parser) took 33905.20 ms. Allocated memory was 152.0 MB in the beginning and 316.7 MB in the end (delta: 164.6 MB). Free memory was 126.1 MB in the beginning and 110.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 180.2 MB. Max. memory is 8.0 GB. [2020-10-27 14:52:10,768 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 14:52:10,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.52 ms. Allocated memory is still 152.0 MB. Free memory was 125.5 MB in the beginning and 115.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 14:52:10,769 INFO L168 Benchmark]: Boogie Preprocessor took 46.21 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 113.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 14:52:10,770 INFO L168 Benchmark]: RCFGBuilder took 541.69 ms. Allocated memory is still 152.0 MB. Free memory was 113.7 MB in the beginning and 96.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-27 14:52:10,771 INFO L168 Benchmark]: TraceAbstraction took 33018.87 ms. Allocated memory was 152.0 MB in the beginning and 316.7 MB in the end (delta: 164.6 MB). Free memory was 96.2 MB in the beginning and 110.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 150.8 MB. Max. memory is 8.0 GB. [2020-10-27 14:52:10,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.52 ms. Allocated memory is still 152.0 MB. Free memory was 125.5 MB in the beginning and 115.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.21 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 113.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 541.69 ms. Allocated memory is still 152.0 MB. Free memory was 113.7 MB in the beginning and 96.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33018.87 ms. Allocated memory was 152.0 MB in the beginning and 316.7 MB in the end (delta: 164.6 MB). Free memory was 96.2 MB in the beginning and 110.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 150.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 29]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L38] signed long long ARR_SIZE ; [L42] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L43] CALL assume_abort_if_not(ARR_SIZE > 0) [L32] COND FALSE !(!cond) [L43] RET assume_abort_if_not(ARR_SIZE > 0) [L45] int array1[ARR_SIZE] ; [L46] int array2[ARR_SIZE] ; [L47] int count = 0, num = -1 ; [L48] signed long long sum = 0 ; [L49] int temp ; [L50] signed long long index,pivot ; [L52] count=0 [L52] COND TRUE count 0) [L32] COND FALSE !(!cond) [L64] RET assume_abort_if_not(pivot > 0) [L65] CALL assume_abort_if_not(index >= pivot && index < ARR_SIZE-pivot) [L32] COND FALSE !(!cond) [L65] RET assume_abort_if_not(index >= pivot && index < ARR_SIZE-pivot) [L67] EXPR array1[index-pivot] [L67] EXPR array1[index+pivot] [L67] array1[index] = array1[index-pivot] + array1[index+pivot] [L68] EXPR array2[index-pivot] [L68] EXPR array2[index+pivot] [L68] array2[index] = array2[index-pivot] + array2[index+pivot] [L70] temp = __VERIFIER_nondet_int() [L71] COND TRUE temp == 0 [L74] count=0 [L74] COND TRUE count