/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loop-acceleration/phases_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:15:28,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:15:28,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:15:28,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:15:28,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:15:28,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:15:28,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:15:28,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:15:28,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:15:28,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:15:28,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:15:28,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:15:28,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:15:28,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:15:28,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:15:28,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:15:28,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:15:28,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:15:28,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:15:28,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:15:28,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:15:28,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:15:28,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:15:28,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:15:28,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:15:28,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:15:28,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:15:28,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:15:28,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:15:28,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:15:28,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:15:28,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:15:28,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:15:28,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:15:28,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:15:28,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:15:28,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:15:28,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:15:28,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:15:28,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:15:28,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:15:28,214 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 [2020-10-14 05:15:28,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:15:28,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:15:28,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:15:28,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:15:28,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:15:28,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:15:28,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:15:28,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:15:28,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:15:28,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:15:28,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:15:28,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:15:28,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:15:28,243 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:15:28,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:15:28,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:15:28,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:15:28,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:15:28,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:15:28,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:15:28,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:15:28,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:15:28,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:15:28,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:15:28,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:15:28,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:15:28,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:15:28,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:15:28,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:15:28,246 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:15:28,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:15:28,607 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:15:28,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:15:28,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:15:28,621 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:15:28,621 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2020-10-14 05:15:28,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1893c066d/2503d9a51d6b4763a7e3234c5b054d35/FLAG9b87990d5 [2020-10-14 05:15:29,132 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:15:29,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2020-10-14 05:15:29,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1893c066d/2503d9a51d6b4763a7e3234c5b054d35/FLAG9b87990d5 [2020-10-14 05:15:29,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1893c066d/2503d9a51d6b4763a7e3234c5b054d35 [2020-10-14 05:15:29,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:15:29,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:15:29,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:15:29,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:15:29,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:15:29,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1573d552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29, skipping insertion in model container [2020-10-14 05:15:29,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:15:29,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:15:29,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:15:29,688 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:15:29,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:15:29,712 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:15:29,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29 WrapperNode [2020-10-14 05:15:29,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:15:29,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:15:29,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:15:29,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:15:29,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (1/1) ... [2020-10-14 05:15:29,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:15:29,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:15:29,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:15:29,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:15:29,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (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 [2020-10-14 05:15:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:15:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:15:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:15:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:15:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:15:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:15:29,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:15:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:15:29,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:15:30,052 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:15:30,052 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:15:30,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:15:30 BoogieIcfgContainer [2020-10-14 05:15:30,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:15:30,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:15:30,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:15:30,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:15:30,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:15:29" (1/3) ... [2020-10-14 05:15:30,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cb151e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:15:30, skipping insertion in model container [2020-10-14 05:15:30,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:29" (2/3) ... [2020-10-14 05:15:30,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cb151e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:15:30, skipping insertion in model container [2020-10-14 05:15:30,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:15:30" (3/3) ... [2020-10-14 05:15:30,063 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_1-1.c [2020-10-14 05:15:30,072 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:15:30,078 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:15:30,093 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:15:30,117 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:15:30,117 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:15:30,118 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:15:30,118 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:15:30,118 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:15:30,118 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:15:30,118 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:15:30,118 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:15:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 05:15:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:15:30,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:30,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:30,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:30,152 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 05:15:30,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:30,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486664747] [2020-10-14 05:15:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:15:30,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-14 05:15:30,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:30,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:30,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:30,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:15:30,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:30,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:30,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 05:15:30,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:30,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:30,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:30,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:30,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486664747] [2020-10-14 05:15:30,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:30,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:15:30,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093187971] [2020-10-14 05:15:30,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:15:30,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:15:30,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:15:30,568 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-14 05:15:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:30,586 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 05:15:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:15:30,587 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:15:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:30,594 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:15:30,595 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:15:30,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:15:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:15:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:15:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:15:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 05:15:30,630 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 05:15:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:30,631 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 05:15:30,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:15:30,631 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 05:15:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:15:30,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:30,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:30,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:15:30,633 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-14 05:15:30,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:30,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795031054] [2020-10-14 05:15:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:30,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:15:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:15:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:30,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:30,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:30,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:15:30,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:30,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:30,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795031054] [2020-10-14 05:15:30,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:30,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:15:30,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63462734] [2020-10-14 05:15:30,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:15:30,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:15:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:30,864 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 05:15:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:30,889 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-14 05:15:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:15:30,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:15:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:30,891 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:15:30,891 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:15:30,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:15:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:15:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:15:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:15:30,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:15:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:30,899 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:15:30,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:15:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:15:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:15:30,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:30,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:30,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:15:30,902 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 05:15:30,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:30,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861822850] [2020-10-14 05:15:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:15:30,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:30,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 05:15:30,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:15:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:15:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:15:30,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:31,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:31,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:31,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:15:31,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:15:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:31,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861822850] [2020-10-14 05:15:31,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:31,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:15:31,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2199520] [2020-10-14 05:15:31,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:15:31,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:15:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:31,064 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 05:15:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:31,122 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 05:15:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:15:31,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:15:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:31,126 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:15:31,126 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:15:31,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:15:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:15:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:15:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:15:31,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 05:15:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:31,136 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:15:31,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:15:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:15:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:15:31,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:31,138 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:31,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:15:31,138 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-14 05:15:31,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:31,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799185720] [2020-10-14 05:15:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:15:31,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:31,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-14 05:15:31,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:15:31,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:31,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:15:31,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:31,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:31,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:31,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:31,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:31,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799185720] [2020-10-14 05:15:31,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:31,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:15:31,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114710976] [2020-10-14 05:15:31,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:15:31,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:15:31,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:15:31,484 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:15:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:31,511 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:15:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:15:31,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:15:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:31,513 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:15:31,513 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:15:31,513 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 [2020-10-14 05:15:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:15:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:15:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:15:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:15:31,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-14 05:15:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:31,519 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:15:31,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:15:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:15:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:15:31,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:31,520 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:31,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:15:31,521 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:31,521 INFO L82 PathProgramCache]: Analyzing trace with hash -582276883, now seen corresponding path program 2 times [2020-10-14 05:15:31,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:31,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461166292] [2020-10-14 05:15:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:15:31,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-14 05:15:31,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:15:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:15:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:31,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:31,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:31,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:31,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:31,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:31,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:31,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:31,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:31,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461166292] [2020-10-14 05:15:31,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:31,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:15:31,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998997215] [2020-10-14 05:15:31,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:15:31,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:15:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:31,892 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:15:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:31,923 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:15:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:15:31,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:15:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:31,925 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:15:31,925 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:15:31,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:15:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:15:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:15:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:15:31,932 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-14 05:15:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:31,932 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:15:31,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:15:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:15:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:15:31,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:31,933 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:31,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:15:31,934 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash 719600874, now seen corresponding path program 3 times [2020-10-14 05:15:31,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:31,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754593763] [2020-10-14 05:15:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:31,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:15:32,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-14 05:15:32,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:15:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:15:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:15:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:32,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:32,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:32,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:32,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:15:32,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754593763] [2020-10-14 05:15:32,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:32,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:15:32,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277280468] [2020-10-14 05:15:32,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:15:32,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:32,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:15:32,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:15:32,254 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-14 05:15:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:32,288 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:15:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:15:32,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 05:15:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:32,292 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:15:32,292 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:15:32,293 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 [2020-10-14 05:15:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:15:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:15:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:15:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 05:15:32,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 05:15:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:32,300 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 05:15:32,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:15:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 05:15:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:15:32,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:32,301 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:32,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:15:32,301 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1179295589, now seen corresponding path program 4 times [2020-10-14 05:15:32,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:32,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506685169] [2020-10-14 05:15:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:15:32,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:32,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-14 05:15:32,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:15:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:15:32,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:32,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:32,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:32,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:15:32,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506685169] [2020-10-14 05:15:32,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:32,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:15:32,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674369640] [2020-10-14 05:15:32,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:15:32,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:15:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:32,732 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 05:15:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:32,775 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:15:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:15:32,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:15:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:32,777 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:15:32,777 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:15:32,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:15:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:15:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:15:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:15:32,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 05:15:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:32,784 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:15:32,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:15:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:15:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:15:32,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:32,785 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:32,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:15:32,785 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash 957312226, now seen corresponding path program 5 times [2020-10-14 05:15:32,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:32,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119438090] [2020-10-14 05:15:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:32,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:33,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:15:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-14 05:15:33,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:33,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:15:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:15:33,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:15:33,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:33,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:33,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:33,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:33,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:33,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:15:33,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:33,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:33,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:15:33,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119438090] [2020-10-14 05:15:33,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:33,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:15:33,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672419719] [2020-10-14 05:15:33,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:15:33,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:15:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:33,428 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-14 05:15:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:33,589 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:15:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:15:33,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:15:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:33,591 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:15:33,591 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:15:33,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:15:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-14 05:15:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:15:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:15:33,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2020-10-14 05:15:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:33,602 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:15:33,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:15:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:15:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:15:33,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:33,603 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:33,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:15:33,604 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:33,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1986638173, now seen corresponding path program 6 times [2020-10-14 05:15:33,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:33,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448798618] [2020-10-14 05:15:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:33,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:34,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:34,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:15:34,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:15:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-14 05:15:34,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:34,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:15:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:15:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:15:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:34,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:34,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:34,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:34,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:34,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:34,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:34,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:34,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:34,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:34,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:34,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:34,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:15:34,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448798618] [2020-10-14 05:15:34,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:34,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:15:34,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602274611] [2020-10-14 05:15:34,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:15:34,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:15:34,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:15:34,396 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-14 05:15:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:34,490 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:15:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:15:34,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 05:15:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:34,491 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:15:34,491 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:15:34,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:15:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:15:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:15:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:15:34,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-14 05:15:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:34,493 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:15:34,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:15:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:15:34,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:15:34,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:15:34,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:15:36,692 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-14 05:15:36,697 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 05:15:36,698 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:15:36,698 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:15:36,698 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:15:36,698 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:15:36,698 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:15:36,699 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2020-10-14 05:15:36,699 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2020-10-14 05:15:36,699 INFO L268 CegarLoopResult]: For program point L14(lines 14 18) no Hoare annotation was computed. [2020-10-14 05:15:36,699 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2020-10-14 05:15:36,699 INFO L264 CegarLoopResult]: At program point L14-2(lines 13 19) the Hoare annotation is: (or (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 1)) 4294967296)) 65520)) (<= (+ main_~x~0 (* 2 (div (+ (* main_~x~0 (- 1)) 65523) 2))) 65522)) [2020-10-14 05:15:36,700 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 19) the Hoare annotation is: (<= (+ main_~x~0 (* 2 (div (+ (* main_~x~0 (- 1)) 65523) 2))) 65522) [2020-10-14 05:15:36,700 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-14 05:15:36,700 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:15:36,708 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-14 05:15:36,708 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:15:36,708 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-14 05:15:36,708 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:15:36,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:15:36 BoogieIcfgContainer [2020-10-14 05:15:36,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:15:36,729 INFO L168 Benchmark]: Toolchain (without parser) took 7226.06 ms. Allocated memory was 144.2 MB in the beginning and 289.9 MB in the end (delta: 145.8 MB). Free memory was 100.7 MB in the beginning and 262.3 MB in the end (delta: -161.6 MB). Peak memory consumption was 154.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:36,730 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-14 05:15:36,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.08 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 91.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:36,732 INFO L168 Benchmark]: Boogie Preprocessor took 108.84 ms. Allocated memory was 144.2 MB in the beginning and 199.8 MB in the end (delta: 55.6 MB). Free memory was 91.1 MB in the beginning and 179.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:36,733 INFO L168 Benchmark]: RCFGBuilder took 233.31 ms. Allocated memory is still 199.8 MB. Free memory was 179.7 MB in the beginning and 167.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:36,733 INFO L168 Benchmark]: TraceAbstraction took 6670.76 ms. Allocated memory was 199.8 MB in the beginning and 289.9 MB in the end (delta: 90.2 MB). Free memory was 166.9 MB in the beginning and 262.3 MB in the end (delta: -95.4 MB). Peak memory consumption was 165.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:36,737 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 144.2 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 208.08 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 91.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.84 ms. Allocated memory was 144.2 MB in the beginning and 199.8 MB in the end (delta: 55.6 MB). Free memory was 91.1 MB in the beginning and 179.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 233.31 ms. Allocated memory is still 199.8 MB. Free memory was 179.7 MB in the beginning and 167.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6670.76 ms. Allocated memory was 199.8 MB in the beginning and 289.9 MB in the end (delta: 90.2 MB). Free memory was 166.9 MB in the beginning and 262.3 MB in the end (delta: -95.4 MB). Peak memory consumption was 165.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x <= 4294967296 * ((x + -1) / 4294967296) + 65520 || x + 2 * ((x * -1 + 65523) / 2) <= 65522 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 6 SDslu, 149 SDs, 0 SdLazy, 132 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=8, 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, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 24 NumberOfFragments, 43 HoareAnnotationTreeSize, 15 FomulaSimplifications, 237 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 8111 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 110/140 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...