/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:11:52,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:11:52,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:11:52,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:11:52,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:11:52,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:11:52,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:11:52,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:11:52,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:11:52,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:11:52,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:11:52,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:11:52,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:11:52,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:11:52,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:11:52,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:11:52,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:11:52,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:11:52,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:11:52,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:11:52,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:11:52,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:11:52,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:11:52,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:11:52,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:11:52,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:11:52,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:11:52,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:11:52,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:11:52,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:11:52,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:11:52,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:11:52,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:11:52,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:11:52,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:11:52,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:11:52,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:11:52,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:11:52,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:11:52,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:11:52,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:11:52,297 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 [2020-10-15 00:11:52,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:11:52,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:11:52,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:11:52,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:11:52,355 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:11:52,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:11:52,356 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:11:52,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:11:52,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:11:52,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:11:52,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:11:52,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:11:52,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:11:52,358 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:11:52,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:11:52,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:11:52,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:11:52,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:11:52,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:11:52,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:11:52,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:11:52,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:11:52,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:11:52,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:11:52,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:11:52,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:11:52,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:11:52,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:11:52,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:11:52,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:11:52,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:11:52,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:11:52,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:11:52,701 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:11:52,702 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:11:52,702 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-10-15 00:11:52,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f8bd8547/4991b4e37b974bfeb2c751b36bf58e44/FLAG0e1c38f7b [2020-10-15 00:11:53,211 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:11:53,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-10-15 00:11:53,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f8bd8547/4991b4e37b974bfeb2c751b36bf58e44/FLAG0e1c38f7b [2020-10-15 00:11:53,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f8bd8547/4991b4e37b974bfeb2c751b36bf58e44 [2020-10-15 00:11:53,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:11:53,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:11:53,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:11:53,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:11:53,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:11:53,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dccfc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53, skipping insertion in model container [2020-10-15 00:11:53,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:11:53,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:11:53,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:11:53,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:11:53,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:11:53,876 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:11:53,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53 WrapperNode [2020-10-15 00:11:53,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:11:53,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:11:53,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:11:53,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:11:53,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (1/1) ... [2020-10-15 00:11:53,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:11:53,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:11:53,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:11:53,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:11:53,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (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 [2020-10-15 00:11:54,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:11:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:11:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:11:54,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:11:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:11:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:11:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:11:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:11:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:11:54,237 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:11:54,237 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:11:54,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:11:54 BoogieIcfgContainer [2020-10-15 00:11:54,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:11:54,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:11:54,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:11:54,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:11:54,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:11:53" (1/3) ... [2020-10-15 00:11:54,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596b75df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:11:54, skipping insertion in model container [2020-10-15 00:11:54,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:53" (2/3) ... [2020-10-15 00:11:54,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596b75df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:11:54, skipping insertion in model container [2020-10-15 00:11:54,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:11:54" (3/3) ... [2020-10-15 00:11:54,249 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-15 00:11:54,260 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:11:54,267 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:11:54,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:11:54,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:11:54,302 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:11:54,302 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:11:54,303 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:11:54,303 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:11:54,303 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:11:54,303 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:11:54,303 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:11:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-15 00:11:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:11:54,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:54,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:54,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-15 00:11:54,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:54,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460834088] [2020-10-15 00:11:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:54,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:54,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:11:54,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:11:54,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-15 00:11:54,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:54,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:54,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:11:54,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:11:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:54,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:54,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:54,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:11:54,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:54,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:54,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:54,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:54,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460834088] [2020-10-15 00:11:54,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:11:54,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:11:54,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123867669] [2020-10-15 00:11:54,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:54,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:54,658 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-15 00:11:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:54,749 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-15 00:11:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:54,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-15 00:11:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:54,761 INFO L225 Difference]: With dead ends: 40 [2020-10-15 00:11:54,762 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:11:54,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:11:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-15 00:11:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 00:11:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-15 00:11:54,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-15 00:11:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:54,809 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-15 00:11:54,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-15 00:11:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:11:54,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:54,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:54,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:11:54,811 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-10-15 00:11:54,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:54,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063786388] [2020-10-15 00:11:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:54,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:54,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:11:54,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:11:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-15 00:11:54,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:54,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:11:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:54,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:11:54,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:55,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:55,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:55,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:55,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:55,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:55,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:55,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:55,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:55,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:55,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:55,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063786388] [2020-10-15 00:11:55,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:55,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:11:55,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493430003] [2020-10-15 00:11:55,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:11:55,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:55,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:11:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:11:55,022 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-15 00:11:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:55,059 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-15 00:11:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:11:55,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-15 00:11:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:55,061 INFO L225 Difference]: With dead ends: 30 [2020-10-15 00:11:55,061 INFO L226 Difference]: Without dead ends: 19 [2020-10-15 00:11:55,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:11:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-15 00:11:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-15 00:11:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 00:11:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-15 00:11:55,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-15 00:11:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:55,069 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-15 00:11:55,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:11:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-15 00:11:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:11:55,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:55,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:55,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:11:55,071 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-10-15 00:11:55,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:55,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410959162] [2020-10-15 00:11:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:55,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:55,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:11:55,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:11:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-15 00:11:55,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:55,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:11:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:55,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:55,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:55,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:55,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:55,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:55,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:55,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:55,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:55,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410959162] [2020-10-15 00:11:55,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:55,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:11:55,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607454255] [2020-10-15 00:11:55,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:55,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:55,304 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-15 00:11:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:55,349 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-15 00:11:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:55,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-15 00:11:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:55,351 INFO L225 Difference]: With dead ends: 30 [2020-10-15 00:11:55,352 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:11:55,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:11:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-15 00:11:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:11:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-15 00:11:55,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-15 00:11:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:55,359 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-15 00:11:55,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-15 00:11:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:11:55,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:55,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:55,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:11:55,362 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-10-15 00:11:55,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:55,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003517209] [2020-10-15 00:11:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:55,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:55,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:11:55,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:11:55,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-15 00:11:55,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:55,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:11:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:55,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:11:55,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:11:55,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:55,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:55,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:55,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:55,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:55,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:11:55,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:55,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:55,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:55,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:55,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:11:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:55,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003517209] [2020-10-15 00:11:55,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:55,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:11:55,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804327519] [2020-10-15 00:11:55,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:11:55,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:11:55,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:55,921 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-15 00:11:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:56,018 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-15 00:11:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:11:56,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-15 00:11:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:56,022 INFO L225 Difference]: With dead ends: 30 [2020-10-15 00:11:56,022 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:11:56,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:11:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-15 00:11:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:11:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-15 00:11:56,036 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-10-15 00:11:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:56,037 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-15 00:11:56,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:11:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-15 00:11:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:11:56,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:56,039 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:56,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:11:56,040 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-10-15 00:11:56,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:56,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036699848] [2020-10-15 00:11:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:56,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:11:56,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:11:56,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-15 00:11:56,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:56,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:56,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:11:56,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:56,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:11:56,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:56,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:56,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:56,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:56,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:11:56,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:56,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:56,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:56,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:56,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:56,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036699848] [2020-10-15 00:11:56,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:56,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:11:56,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544858146] [2020-10-15 00:11:56,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:11:56,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:11:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:11:56,379 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-15 00:11:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:56,432 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-15 00:11:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:11:56,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-15 00:11:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:56,435 INFO L225 Difference]: With dead ends: 39 [2020-10-15 00:11:56,435 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:11:56,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:11:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:11:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-15 00:11:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:11:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-15 00:11:56,444 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-15 00:11:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:56,444 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-15 00:11:56,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:11:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-15 00:11:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:11:56,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:56,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:56,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:11:56,446 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 2 times [2020-10-15 00:11:56,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:56,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092990558] [2020-10-15 00:11:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:56,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:11:56,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:11:56,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-15 00:11:56,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:56,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:11:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:11:56,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:56,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:56,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:56,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:56,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:56,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:56,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:56,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:56,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:56,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:56,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:56,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092990558] [2020-10-15 00:11:56,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:56,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:11:56,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615590717] [2020-10-15 00:11:56,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:11:56,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:11:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:56,656 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-10-15 00:11:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:56,731 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-15 00:11:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:11:56,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-15 00:11:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:56,733 INFO L225 Difference]: With dead ends: 40 [2020-10-15 00:11:56,733 INFO L226 Difference]: Without dead ends: 35 [2020-10-15 00:11:56,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-15 00:11:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-15 00:11:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:11:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-15 00:11:56,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-10-15 00:11:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:56,740 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-15 00:11:56,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:11:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-15 00:11:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:11:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:56,741 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:56,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:11:56,741 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 3 times [2020-10-15 00:11:56,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:56,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431758365] [2020-10-15 00:11:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 00:11:56,750 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 00:11:56,751 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 00:11:56,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:11:56,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:11:56 BoogieIcfgContainer [2020-10-15 00:11:56,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 00:11:56,774 INFO L168 Benchmark]: Toolchain (without parser) took 3132.89 ms. Allocated memory was 145.2 MB in the beginning and 246.9 MB in the end (delta: 101.7 MB). Free memory was 101.7 MB in the beginning and 215.9 MB in the end (delta: -114.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-15 00:11:56,775 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-15 00:11:56,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.55 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:56,777 INFO L168 Benchmark]: Boogie Preprocessor took 118.44 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 91.8 MB in the beginning and 179.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:56,778 INFO L168 Benchmark]: RCFGBuilder took 244.09 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 167.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:56,779 INFO L168 Benchmark]: TraceAbstraction took 2529.80 ms. Allocated memory was 200.8 MB in the beginning and 246.9 MB in the end (delta: 46.1 MB). Free memory was 167.4 MB in the beginning and 215.9 MB in the end (delta: -48.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-15 00:11:56,782 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.55 ms. Allocated memory is still 145.2 MB. Free memory was 101.3 MB in the beginning and 91.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.44 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 91.8 MB in the beginning and 179.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.09 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 167.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2529.80 ms. Allocated memory was 200.8 MB in the beginning and 246.9 MB in the end (delta: 46.1 MB). Free memory was 167.4 MB in the beginning and 215.9 MB in the end (delta: -48.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 55 SDslu, 209 SDs, 0 SdLazy, 124 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 145 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 4635 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 7/110 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 incorrect! Received shutdown request...